Some wonder if nighttime helicopters are part of immigration enforcement. But for some, it’s been a question even before Midway Blitz. If you live in Chicago, you’ve seen and heard helicopters.

Two helicopters that crashed in Hammonton on Dec. 28, killing both pilots, were flying in formation just before colliding, a preliminary National Transportation Safety Board report says. The report ...

Authorities have said the Black Hawk crew was flying too high, as though unaware of their true position in the sky and the danger they were in An investigator presented a visibility study that shows ...