Salvage crews have shifted their focus to clearing smaller debris from the Potomac River following last week ... the water and it can basically map the surface of the bottom," Brauchle explained ...

Potomac by Air: Our Nation's River is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...

National Transportation Safety Board Chair Jennifer Homendy explains the margin of error problem by referencing their chart in the preliminary report that maps the ...