The NTSB released its preliminary report for the Jan. 29 Potomac midair that killed 67 people, revealing details about missed ...

by the Naval Surface Warfare Center, Carderock Division, Carderock, Md. The threeyear contract will furnish a mix of naval architecture, marine engineering, system analysis, systems definition ...

Observed at 00:00, Tuesday 4 March BBC Weather in association with MeteoGroup, external All times are Eastern Standard Time (America/New_York, GMT-5) unless otherwise stated.

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At 8:38:39, the Blackhawk reached the intersection of the D.C. Beltway and the Potomac River near Carderock, Maryland. After briefly turning westbound the helicopter turned back to the east and began ...

Annie Jump Cannon was an astronomer, suffragist, and photographer. Nearly deaf for much of her life, Cannon is credited with the invention of the Harvard spectral classification system, which assigns ...