Jet Stream Winds Played Havoc with Bombs Dropped from 30,000 Feet Over Japan. On 9 March 1945 the United States Army Air Corps (USAAC) XX Bomber Command initiated Operation Meetinghouse. The Twentieth had been using their B-29 Superfortresses to bomb Japan from bases in the Marianas since November 24th 1944, and from bases in China … Continue reading Operation Meetinghouse: LeMay Takes Charge and the B-29s Bore In Low.