Fatal crashes like the one that happened near Washington on Wednesday are increasingly rare because of modern aviation safety ...

The 54-year-old man was crossing from the store to the parking lot when he was struck by a truck driven by a 17-year-old.

Since its creation in 1967, the agency reports it has investigated more than 153,000 aviation accidents and incidents.

Air crash investigations can take months, and federal investigators told reporters they would not speculate on the cause.