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{{Current events|year=2018|month=10|day=20|content=
<!-- All news items below this line -->
;Disasters and accidents
*Four U.S. tourists are killed in [[Costa Rica]] after a rafting accident on a swollen river. [https://www.bbc.com/news/world-latin-america-45931227 (BBC)]
;International relations
*[[Russia–United States relations]]
**[[President of the United States|U.S. President]] [[Donald Trump]] says that the [[United States]] will withdraw from the [[Intermediate-Range Nuclear Forces Treaty]], a 1987 nuclear arms treaty with [[Russia]]. [https://www.theguardian.com/world/2018/oct/20/trump-us-nuclear-arms-treaty-russia (''The Guardian'')]
;Law and crime
*[[Religious violence in Nigeria]]
**A spat in a market in [[Nigeria]]'s northern [[Kaduna State]] results in 55 dead. After the brawl, 22 people were arrested. [https://www.bbc.com/news/world-africa-45930407 (BBC)]
*Tanzanian billionaire [[Mohammed Dewji]] is freed by his captors nine days after being seized by unknown gunmen. [https://www.cnn.com/2018/10/20/africa/tanzania-mohammed-dewji-returns-home/index.html (CNN)] [https://qz.com/africa/1431123/africa-youngest-billionaire-dewji-found-tanzania-after-kidnapping/ (Quartz)]
*[[2018 Sagay massacre|2018 Sagay, Negros Occidental hacienda massacre]]
**Unidentified armed men shoot and kill nine [[sugarcane]] farmers in [[Sagay, Negros Occidental]], Philippines. [https://newsinfo.inquirer.net/1045819/pnp-eyes-4-groups-in-killing-of-9-sugar-farmers-in-sagay (''Philippine Daily Inquirer'')]
*The number of remains of babies, fetuses found stashed in [[Detroit]] funeral home rises to now more than 60. [https://www.reuters.com/article/us-detroit-bodies/remains-of-more-than-60-babies-fetuses-found-stashed-in-detroit-funeral-home-idUSKCN1MU02Z (Reuters)]
;Politics and elections
*[[Afghan parliamentary election, 2018]]
**After a delay of three years, voters in [[Afghanistan]] head to the polls to elect members of the nation's [[House of the People (Afghanistan)|parliament]]. The election is marred by violence and suicide attacks which leave over 170 dead or wounded nationwide. [https://www.dw.com/en/afghanistan-election-multiple-blasts-reported-at-kabul-polling-stations/a-45966503 (''Deutsche Welle'')]
**Because of technical issues in some constituencies, voting was extended until Sunday. Additionally, voting in the [[Kandahar Province]] will be delayed by one week following the assassination of police commander [[Abdul Raziq Achakzai]] two days prior. [https://www.reuters.com/article/us-afghanistan-election-extend/afghanistan-extends-election-to-sunday-due-to-chaos-at-polling-stations-idUSKCN1MU09A (''Reuters'')] [https://gandhara.rferl.org/a/elections-in-afghanistan-s-kandahar-province-to-be-delayed-a-week/29552630.html (''Gandhara'')]
*[[Wentworth by-election, 2018]]
**Independent candidate [[Kerryn Phelps]] leads the vote count in the [[Australian House of Representatives]] seat of [[Division of Wentworth|Wentworth]]. If she wins, the [[Australian House of Representatives]] will enter into a [[hung parliament]]. [https://www.smh.com.au/politics/federal/wentworth-byelection-gap-between-kerryn-phelps-and-dave-sharma-narrows-in-surprise-count-update-20181021-p50azw.html (''The Sydney Morning Herald'')]
*[[Opposition to Brexit in the United Kingdom]]
**More than 600,000 people gather at [[Parliament Square]] in [[London]] as protesters from the [[People's Vote]] campaign call for a second [[Brexit]] referendum deal between the [[United Kingdom]] and the [[European Union]]. [https://www.bbc.com/news/uk-45925542 (BBC)] [http://time.com/5430241/600k-march-london-second-brexit-vote/ (''Time'')]
;Science and technology
*The skull of the [[Luzia Woman]], one of the oldest known human fossils from the Americas, is recovered from the remains of the [[National Museum of Brazil]]. The museum staff states that the museum intends to attempt to restore the fossil. [https://www.bbc.com/news/world-latin-america-4592673 (BBC)]
*A research study published in ''[[The New England Journal of Medicine]]'' describes a significant mortality response to the immunotherapy [[Atezolizumab]] used in conjunction with the chemotherapy [[nab-paclitaxel]] for a type of untreatable [[Breast cancer]] ([[Triple-negative breast cancer|Triple-negative]]) when the tumors also display programmed death ligand 1 ([[PD-L1]]) expression. [https://www.nytimes.com/2018/10/20/health/breast-cancer-immunotherapy.html (''The New York Times'')],[https://www.nejm.org/doi/full/10.1056/NEJMoa1809615 (''The New England Journal of Medicine'')]
;Sports
*[[2018 Major League Baseball season#Postseason|2018 Major League Baseball season]]
**The [[Los Angeles Dodgers]] return to the [[2018 World Series|World Series]] after a 5–1 victory against the [[Milwaukee Brewers]] in game 7 of the [[2018 National League Championship Series|National League Championship Series]]. [http://www.latimes.com/sports/dodgers/la-sp-dodgers-brewers-plaschke-20181020-story.html (''The Los Angeles Times'')]
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<!-- All news items below this line -->
;Disasters and accidents
*Four U.S. tourists are killed in [[Costa Rica]] after a rafting accident on a swollen river. [https://www.bbc.com/news/world-latin-america-45931227 (BBC)]
;International relations
*[[Russia–United States relations]]
**[[President of the United States|U.S. President]] [[Donald Trump]] says that the [[United States]] will withdraw from the [[Intermediate-Range Nuclear Forces Treaty]], a 1987 nuclear arms treaty with [[Russia]]. [https://www.theguardian.com/world/2018/oct/20/trump-us-nuclear-arms-treaty-russia (''The Guardian'')]
;Law and crime
*[[Religious violence in Nigeria]]
**A spat in a market in [[Nigeria]]'s northern [[Kaduna State]] results in 55 dead. After the brawl, 22 people were arrested. [https://www.bbc.com/news/world-africa-45930407 (BBC)]
*Tanzanian billionaire [[Mohammed Dewji]] is freed by his captors nine days after being seized by unknown gunmen. [https://www.cnn.com/2018/10/20/africa/tanzania-mohammed-dewji-returns-home/index.html (CNN)] [https://qz.com/africa/1431123/africa-youngest-billionaire-dewji-found-tanzania-after-kidnapping/ (Quartz)]
*[[2018 Sagay massacre|2018 Sagay, Negros Occidental hacienda massacre]]
**Unidentified armed men shoot and kill nine [[sugarcane]] farmers in [[Sagay, Negros Occidental]], Philippines. [https://newsinfo.inquirer.net/1045819/pnp-eyes-4-groups-in-killing-of-9-sugar-farmers-in-sagay (''Philippine Daily Inquirer'')]
*The number of remains of babies, fetuses found stashed in [[Detroit]] funeral home rises to now more than 60. [https://www.reuters.com/article/us-detroit-bodies/remains-of-more-than-60-babies-fetuses-found-stashed-in-detroit-funeral-home-idUSKCN1MU02Z (Reuters)]
;Politics and elections
*[[Afghan parliamentary election, 2018]]
**After a delay of three years, voters in [[Afghanistan]] head to the polls to elect members of the nation's [[House of the People (Afghanistan)|parliament]]. The election is marred by violence and suicide attacks which leave over 170 dead or wounded nationwide. [https://www.dw.com/en/afghanistan-election-multiple-blasts-reported-at-kabul-polling-stations/a-45966503 (''Deutsche Welle'')]
**Because of technical issues in some constituencies, voting was extended until Sunday. Additionally, voting in the [[Kandahar Province]] will be delayed by one week following the assassination of police commander [[Abdul Raziq Achakzai]] two days prior. [https://www.reuters.com/article/us-afghanistan-election-extend/afghanistan-extends-election-to-sunday-due-to-chaos-at-polling-stations-idUSKCN1MU09A (''Reuters'')] [https://gandhara.rferl.org/a/elections-in-afghanistan-s-kandahar-province-to-be-delayed-a-week/29552630.html (''Gandhara'')]
*[[Wentworth by-election, 2018]]
**Independent candidate [[Kerryn Phelps]] leads the vote count in the [[Australian House of Representatives]] seat of [[Division of Wentworth|Wentworth]]. If she wins, the [[Australian House of Representatives]] will enter into a [[hung parliament]]. [https://www.smh.com.au/politics/federal/wentworth-byelection-gap-between-kerryn-phelps-and-dave-sharma-narrows-in-surprise-count-update-20181021-p50azw.html (''The Sydney Morning Herald'')]
*[[Opposition to Brexit in the United Kingdom]]
**More than 600,000 people gather at [[Parliament Square]] in [[London]] as protesters from the [[People's Vote]] campaign call for a second [[Brexit]] referendum deal between the [[United Kingdom]] and the [[European Union]]. [https://www.bbc.com/news/uk-45925542 (BBC)] [http://time.com/5430241/600k-march-london-second-brexit-vote/ (''Time'')]
;Science and technology
*The skull of the [[Luzia Woman]], one of the oldest known human fossils from the Americas, is recovered from the remains of the [[National Museum of Brazil]]. The museum staff states that the museum intends to attempt to restore the fossil. [https://www.bbc.com/news/world-latin-america-4592673 (BBC)]
*A research study published in ''[[The New England Journal of Medicine]]'' describes a significant mortality response to the immunotherapy [[Atezolizumab]] used in conjunction with the chemotherapy [[nab-paclitaxel]] for a type of untreatable [[Breast cancer]] ([[Triple-negative breast cancer|Triple-negative]]) when the tumors also display programmed death ligand 1 ([[PD-L1]]) expression. [https://www.nytimes.com/2018/10/20/health/breast-cancer-immunotherapy.html (''The New York Times'')],[https://www.nejm.org/doi/full/10.1056/NEJMoa1809615 (''The New England Journal of Medicine'')]
;Sports
*[[2018 Major League Baseball season#Postseason|2018 Major League Baseball season]]
**The [[Los Angeles Dodgers]] return to the [[2018 World Series|World Series]] after a 5–1 victory against the [[Milwaukee Brewers]] in game 7 of the [[2018 National League Championship Series|National League Championship Series]]. [http://www.latimes.com/sports/dodgers/la-sp-dodgers-brewers-plaschke-20181020-story.html (''The Los Angeles Times'')]
<!-- All news items above this line -->}}
