• War in Iraq (2013–2017)
  • Ar-Rutbah offensive (2016)
    • Iraqi Army forces helped by U.S. airstrikes recapture the southwestern city of Ar-Rutbah from the Islamic State of Iraq and the Levant group. The victory will allow for the re-opening of the Baghdad-Amman highway. (Al Jazeera)
• Abkhaz–Georgian conflict
  • Georgia's Ministry of Foreign Affairs expresses "shock and deep concern" after a Georgian citizen, 31-year-old Giga Otkhozoria, was shot dead by Russian Armed Forces troops patrolling areas near the administrative boundary with Abkhazia. (Radio Free Europe/Radio Liberty)

• Shortages in Venezuela
  • Coca-Cola FEMSA suspends all production in Venezuela due to a sugar shortage. (Fortune) (Sputnik)

• 2016 Sri Lankan floods
  • Two hundred thousand people flee the Sri Lankan capital Colombo as floods caused by several days of heavy rain worsen. (AFP via Yahoo!)
• EgyptAir Flight 804
  • Egyptian Armed Forces claim that passenger luggage and part of the aircraft have been found in the Mediterranean Sea 290 kilometers north of Alexandria. (CNN)
• Temperatures soar to a record 51 °C (124 °F) in the Indian state of Rajasthan. The heatwave has claimed 300 lives since April 2016. (BBC)
• At least four National Gendarmerie officers are killed in a helicopter crash in Hautes-Pyrénées, in southwestern France. (The Local)
• List of earthquakes in Australia
  • The United States Geological Survey (USGS) reports a magnitude 5.9 earthquake strikes the southern part of the Northern Territory in central Australia. No damage or injuries are reported. (The Sydney Morning Herald) (RT)

• 2015–16 Zika virus epidemic
  • The Centers for Disease Control and Prevention reports at that least 270 pregnant women in the United States are infected with the Zika virus. (NBC News) (NPR)

• Accession of Montenegro to NATO
  • The Kremlin condemns NATO's membership invitation to Montenegro, warning the step risks fueling geopolitical tensions in Europe. (Reuters)
• War in Afghanistan (2001–2021)
  • NATO foreign ministers, meeting at NATO headquarters in Brussels, Belgium, agree to extend the alliance's Resolute Support Mission, that trains, advises and assists Afghanistan's military beyond 2016. (AP via Daily Mail) (NATO)

• Efforts to impeach Barack Obama
  • The Oklahoma Legislature files a measure asking for Congress to impeach Barack Obama over his decision to allow transgender students to use the bathrooms corresponding to their gender identity. (KOCO)
• The Mexican government approves the extradition of drug boss Joaquín Guzmán to the United States following assurances that he will not face the death penalty. (Reuters)
• A United States Secret Service officer shoots an armed man on a street near the White House after the man allegedly approached the officer and refused to drop his weapon. The White House is locked down. (AP via Yahoo! News) (CNN)
• A highly-reported execution of convicted murderer Kho Jabing occurs at 3.30pm on 20 May 2016 amidst local and international pleas to the government of Singapore to revoke the scheduled execution. (The Straits Times)

• Tsai Ing-wen is sworn in as the first female President of Taiwan. (BBC)
• Israeli Defense minister Moshe Ya'alon announces his resignation. (The New York Times) (BBC) (FOX News)
• The Oklahoma legislature passes a bill that would make it a felony for doctors to perform abortions and revokes the medical license of assisting physicians. The governor then vetoes the bill. (The New York Times) (Washington Post) (CNN)
• 2015–16 Iraqi protests
  • Iraqi security forces fire tear gas and water cannon on protesters attempting to storm the Green Zone in Baghdad, injuring at least 33. (Bloomberg) (WSJ)
  • The Iraqi government imposes a curfew in Baghdad. (Reuters)