Pigeons Scientists release a small flock of pigeons, dubbed "The Pigeon Air Patrol", carrying tiny backpacks to monitor London's air quality during a period of moderate to high pollution. The backpacks contain sensors used to measure nitrogen dioxide and ozone levels.
Brazilian Brazil's ex-president Luiz Inácio Lula da Silva takes Cabinet post as chief of staff to Brazil's current president, Dilma Rousseff, thereby gaining legal shield. Only the Brazilian Supreme Court can try presidential Cabinet members for crimes.
Barack Obama Supreme Court candidates President Barack Obama nominates Merrick Garland to replace Antonin Scalia on the Supreme Court of the United States.
In 2016 In the Missouri Primary, media outlets have held off calling yesterday's races due to the extremely close results. Donald Trump and Hillary Clinton lead in their party's vote, but by just two-tenths of 1 percent ahead of Ted Cruz and Bernie Sanders, respectively. Missouri law states a recount may be requested if the margin is less than half a percentage point. Either Cruz or Sanders or both can request a recount. These results are unofficial, until they’re certified by the Missouri Secretary of State, which reportedly could take up to four weeks. Trump leads by about 1,700 votes and Clinton's edge is about 1,500. The state also needs to count the remaining absentee and provisional ballots; the deadline for overseas ballots is noon Friday.
Curly Haugland Senior GOP rules committee member Curly Haugland says that "We (RCN committee members) choose the nominee, not the voters".
Republican Party presidential debates and forums, 2016 Donald Trump announces he will skip the Fox News GOP presidential debate between the three remaining candidates on March 21, saying he thinks "we had enough of debates."
Attacks on humanitarian workers The U.S. military disciplines more than a dozen personnel for mistakes that led to the bombing of a Médecins Sans Frontières (Doctors Without Borders) hospital that killed 42 people in Afghanistan last October. No criminal charges are pending. The partially redacted investigation report is expected to be made public shortly.
PKK rebellion (2015–present) Authorities in Turkey arrest three academics on charges of "terrorist propaganda" after they called for an end to security operations in the country's Kurdish-majority southeast.
Pakistan The travel ban for former Pakistani President Pervez Musharraf is lifted by the Supreme Court of Pakistan. Musharraf is currently facing treason charges in Pakistan.
Turkey–United Kingdom relations Turkey deports British academic Chris Stephenson, a computer science lecturer at Bilgi University in Istanbul, who is charged with making terrorism propaganda. The UK Foreign Office said it was providing assistance; there has been no comment from Turkish officials.
Syrian civil war Kurdish officials say they plan to declare a federal region in northern Syria after being excluded from peace talks in Geneva aimed at ending the 5-year-old conflict. The move will combine three Kurdish-led autonomous areas into a federal system in what is set to alarm neighboring Turkey.
The delegation of the government of Syria rules out starting any direct talks with the opposition delegation as U.N. sponsored peace talks enter a third day in Geneva.
North Korea–United States relations President Barack Obama orders new sanctions against North Korea in response to 'illicit' nuclear, missile tests.
North Korea sentences American Otto Warmbier, a 21-year-old from Cincinnati, Ohio, studying at the University of Virginia, to 15 years hard labor for removing a political poster from a hotel.
Zika virus outbreak Cuban officials announce they have detected the first case of the Zika virus transmitted inside the country: a 21-year-old Havana woman who had not traveled abroad. Cuba has reported a handful of travel-associated Zika cases, all believed imported from Venezuela.
Washington Metro The Washington Metro, a commuter rail system which transports nearly 1 million passengers across the Washington, D.C. metropolitan area per day, shuts down to allow for an emergency inspection of 600 electrical cables, following two fires occurring over the past 14 months. Officials say the system is scheduled to resume service by the following morning, though individual Metro lines or stations could remain closed indefinitely if problems are identified.
Boko Haram insurgency Two female suicide bombers detonate their explosives at a mosque during morning prayer on the outskirts of Maiduguri, Nigeria, killing 22 and injuring 18.
War in North-West Pakistan A bomb detonates in a bus carrying government employees in Peshawar, Pakistan, killing 15 and injuring at least 54.