 Although the bomb was not armed with the trigger (a removable capsule of fissionable material which was securely stored in a containment area on board the plane), it nevertheless contained a high-explosive detonator.The resulting explosion created a crater estimated to be wide and 25–35 feet (7.6–10.7 m) deep.It destroyed a local playhouse, near the residence of Walter Gregg, and leveled nearby trees.