Helicopter overflights over NW Washington (updated posting)

Image from (NB: not that I am sure the helicopters flying over my -- our -- neighborhood are military)

This heli-hell-copter noise occurs about -- say -- four times a day according to my non-scientific survey, as I work at home on my blog and articles, which require their author a modicum of silence to produce acceptable work.

My latest (of several) calls re this aerial, USA Vietnam War-style noise invasion  [Ok, only five too-long ten minutes per overflight, and sans napalm] in the sky of Washington, D.C to the Office of Inspector General (DOT) 1-800-424-9071, resulted in the polite person (who said he was "on contract" with the agency -- no wonder he was so polite?), saying that I should contact: www.ffaa.gov.

BTW, my "complaint" number re the helicopter noise at FAA is: 160302-15. Below my notes on the helicopter flights (I fully stand to be corrected re the exact time).

3/10

10:15
11:19
12:13

3/11

9:08
10:40 (two helicopters)
14:04
14:32
16:03

3/12
11:8
12:17

3/13
12:17
21:17

3/14

13:15
14:15
15:14

3/15

10:30
13:54 (several helicopters)
16:41