Sen. Tammy Duckworth, a former Blackhawk pilot, talked with CBS News' Nikole Killion about the midair collision of a plane ...

The female black fly uses her mouth parts to snip the skin, often on the head, ears, neck, or forehead, though they’ll bite ...

This data point is one of several key mysteries investigators are exploring as they seek to explain what caused the nation's worst air disaster in more than a decade, aviation experts said.