[Image: From Battle: Los Angeles (2011)].
As NBC Los Angeles reports, the exercises are for “the purpose of enhancing soldier skills by operating in various urban environments and settings… Residents around the L.A. area may hear sounds associated with training, including aircraft and weapon simulations.”
Recall—as cited by Mike Davis in his book City of Quartz—that this is not the first time L.A. has been used as an urban-warfare simulator. “Scores of residents in the Bunker Hill and Civic Center areas complained of the racket Thursday night after several of the Army helicopters began maneuvering close to high-rise apartments and condominiums at about 10 p.m.,” the L.A. Times reported way back in 1989. At the time, these close-building maneuvers were meant to test “urban approach and departure techniques.”
(Thanks to Nicola Twilley for the tip!)