The MiG-29 was shot down over Luhansk, where Kiev's forces are said to have captured a police station as they tighten a circle around pro-Russia separatists.
The pressure placed on schools and educators by high-stakes tests can lead to unintended consequences.
The announcement comes after a night of protests that saw seven arrests for "failure to disperse" despite a curfew. One person was also shot and critically wounded during the protests.
Missouri Gov. Jay Nixon declared a state of emergency in Ferguson on Saturday and enforced a five-hour curfew. The night ended with tear gas and arrests of some protesters.
New York Times journalist Alissa Rubin was injured in a helicopter crash in northern Iraq last week. NPR's Linda Wertheimer has an update on her recovery.
NPR's Linda Wertheimer talks to U.S. Ambassador to the United Nations Samantha Power about her recent trip to South Sudan.
In 1976, Dr. David Heymann of the London School of Hygiene and Tropical Medicine helped curb the first Ebola outbreak in what was then Zaire. He speaks with NPR's Linda Wertheimer.
American fighter jets and drones carried out airstrikes against Islamist targets near the Mosul Dam in northern Iraq on Saturday. A breach of the dam could threaten entire cities.
Israel forbids Gazan boats from going more than a few miles from shore, where the fish are few and small. Israel says the blockade is for security; Palestinians say it's illegal.