Explosion-Like Noise Heard Across D.C. Area Was a Sonic Boom, Officials Say

A loud noise that was heard across much of the Washington, D.C., area on Sunday afternoon, including in the suburbs of Virginia and Maryland, was caused by a sonic boom from an authorized Defense Department flight, the Annapolis Office of Emergency Management said.It was not immediately clear where the flight originated or which branch of the military was operating it.

Read at www.nytimes.com