The next steps in the fatal midair plane and helicopter crash investigation. And, why nuclear testing could ramp up in the U.S., as well as a look inside the secret lab where weapons testing happens.

Captain Chesley Sullenberger, who famously landed a passenger plane on New York's Hudson River in 2009, has revealed his theory of what happened yesterday.

The so-called “black box” is one of the most important pieces of forensic evidence following a plane crash. There are ...

Sixty-seven people are believed to have died after a passenger plane hit a military helicopter in mid-air near Washington ...