This morning, DCist heard more complaints from District residents about yet another loud racket which woke them up a little earlier than they would have preferred. Fortunately, though, we didn’t have to go on quite the same kind of wild goose chase to figure out what happened this time — Arlington’s alert system filled us in that, indeed, the booming noises were again blank cannon blasts, fired during a drill conducted by the Old Guard’s Presidential Salute Battery.

Victory is ours! DCist has finally hammered down precisely what was creating noises that sounded like pile driving around the District early this morning: a World War II Anti-Tank Gun. Yes, you read that correctly.

Oh, you better believe DCist is still on the case of the mysterious noise which woke the District this morning. (We’ve got stick-to-itiveness, what can I say.) Tamika Wright, a spokesperson at Fort Myer, tells DCist that the cannon blasts “weren’t coming from” the base as we previously suspected, but instead were being fired at Arlington Cemetery as part of an installation. So we dialed up Arlington National Cemetery spokesperson Steve Satkowski, who tells DCist that there was indeed some blasts being fired at the Cemetery this morning.

Our Fox Mulder-esque search for the truth about this morning’s blasting continues! DCist was able to get in touch with Shannon Whalen-McDaniel, a spokesperson for Arlington County, regarding the possibility that the noise had originated from the work which is currently going on at the Rosslyn Metro station.

Were you awakened by loud, booming noises which started at about 6 a.m. this morning and resonated throughout the District? Your editor-in-chief slept right through them over here at DCist HQ, but most of the city wasn’t as fortunate.

Reader Jim Drey sent us this video of a man who parked himself in front of the Washington Post’s downtown headquarters at 1150 15th Street NW this afternoon to tell everyone — and we mean everyone — that the Post’s editorial page stinks.