Laggin' Dragon was the name of a Boeing B-29 Superfortress (B-29-50-MO, 44-86347 Victor number 95) configured to carry the atomic bomb in World War II.
Edward M. Costello, Aircraft Commander) flew it to Wendover in early July and briefly used in training and practice bombing missions.
After removing and replacing some major tail assemblies, Laggin' Dragon and its cargo continued to Hawaii, finally reaching Tinian on August 2.
It was assigned the square P tail identifier of the 39th Bomb Group as a security measure and given Victor (unit-assigned identification) number 95 to avoid misidentification with actual 39th BG aircraft.
On August 9, 1945, as part of the second atomic bomb mission, it was flown by another crew as the weather reconnaissance aircraft for the secondary target of Nagasaki.