insulation panels had already been suspected during Centaur development of being a potential problem area, and the possibility of an LH2 tank rupture was considered as a failure scenario. Testing was suspended while efforts were made to correct the Centaur's design flaws. Investigation A Congressional investigation in June 1962 called the overall management of the Centaur program "weak", and Wernher von Braun recommended that it be cancelled in favor of a Saturn I with an Agena upper stage for planetary missions. In addition, the production Centaur stage had less lift capacity than originally planned, leading to ARPA cancelling Project ADVENT. NASA transferred Centaur development from MSFC to the Lewis Research Center in Ohio where a team headed by Abe Silverstein worked to correct the insulation panel problems and various other design flaws. In November 1962, President Kennedy suggested cancelling Centaur entirely, but was talked out of it on the grounds that the experience gained with liquid hydrogen rocket engines was vital to the success of the Apollo program. In addition, von Braun now proposed the Saturn-Agena be ruled out for cost reasons – Saturn was much too expensive to justify as a launch vehicle for small uncrewed probes. Agena was proving to be a reliability nightmare in both Air Force and NASA programs. Eight Atlas-Centaur test missions were scheduled to be completed by the end of 1964, followed by the first Surveyor program launch. Centaur was upgraded to a high priority project because of this direct relation to Apollo. Meanwhile, the Department of Defense (DoD) had settled on the Titan family for its heavy-lift launching needs and so the Atlas-Centaur would remain a civilian launch vehicle used by NASA to fly scientific and commercial payloads. A conflict between the Air Force, who had primary oversight of the Atlas, and NASA also existed as the Centaur stage required various modifications to the basic Atlas. By 1962, the Air Force had considered the Atlas fully developed and operational and was against any further significant changes to it which might potentially jeopardize the ICBM program. The dispute was ultimately resolved by NASA agreeing to purchase standard Atlas D vehicles which could be custom-modified for Centaur launches. However, when the Atlas ICBM program ended in 1965, Convair replaced all of the earlier variants with a standardized booster for all space launches. Second flight More than a year later, on 27 November 1963 at 19:03:23