Strategic Air Command B-52 bombers strike targets in North Vietnam for the first time. They hit a supply route in the Mu Gia Pass, about 85 miles north of the border.
The cost of the nuclear AGM-181 Long-Range Stand Off missile has come down slightly and the program is on track, but several technologies it relies on are still considered immature, the Government Accountability Office found in a report. Meanwhile, the GAO also assessed the LGM-35A Sentinel intercontinental ballistic missile as…