Rob Wainwright, the head of Europol, says ISIS has developed "an external command force" to carry out special forces-style attacks on the West
Authorities say two suspects in custody after a 29-year-old officer was shot and killed near Prince George County's police headquarters
Texas police officer said agitated man damaged a street sign, paced and yelled obscenities; family said it was man's birthday
Tuesday's primaries in five states will provide the clearest clues yet to whether Donald Trump can secure the nomination outright—and to the other candidates' paths forward