The Air Forces therefore shifted to the training of replacement aircrew and special projects like the Boeing B-29 Superfortress program.

[2] By September 1944, when Lieutenant Colonel Paul Tibbets visited Wendover for the first time, this training program was ending, and there was only one aircraft left.

[3] Tibbets had recently been selected to command the 509th Composite Group, although it had not yet been formed, and Wendover was one of three bases offered to him.

As part of Operation Carpetbagger, this unit had air dropped agents, weapons and supplies to resistance fighters in German-occupied Europe.

[10] Test drop missions were initially flown by Shields and Heflin.To help out with an increasingly demanding schedule, four crews from the 393d Bombardment Squadron were made available.

[10] One of the three B-29s that carried Fat Man assemblies to Tinian was from the 216th Army Air Forces Base Unit's Flight Test Section.

[12] To assemble bombs for the Flight Test Section, the 1st Ordnance Squadron, Special (Aviation) was activated on 6 March 1945 under the command of Captain Charles F. H.

[14] The 216th Army Air Forces Base Unit began forming and training a Special Ordnance Detachment in January 1945 under the command of Captain Henry Roerkohl to take over the role of supporting the Flight Test Section.

[15] It moved to Oxnard Field in September, where it was transferred to the Manhattan District's 9812th Technical Services Unit on 17 December 1945.