VII five B-S7B aircraft for a period of four months or four aircraft and crews for five months .” In November 1955, Colonel Samuel was called to a conference held at Air Force headquarters and stated his needs so successfully that Tactical Air Command was directed to furnish five B-57B aircraft, 21 pilots and navigators, together with the necessary support personnel, Thereupon, that command delegated the LOSth Bomb Wing to furnish two aircraft and to hold a spare in readiness, and the l6lst Bomb Wing to furnish three aircraft.!° Instrumentation and modification of the above aircraft terminated in February 1956, and the aircraft and crews arrived at the proving ground in Apréi. Shots and Aircraft Participation During August 1955, additional sampling requirements appeared in Program 6.3, consisting of ionospheric studies designed to measure the effects of mclear discharge on the fonosphere and with assistance to a secondary project (ultrasonics) in observing and recording signals emanating from nuclear detonations at ever increasing distances from ground zero so as to determine the maximim distance at which these Signals might be discerned and recorded, The Cambridge Research Center furnished an instrumented GS-97 aircraft with its crew for the purpose,++ Throughout Operation REDWING, perhaps the greatest single source of trouble in achieving the smoothest of operations was the inability of controller communications center to maintain clear contact with airborne crews. Failures of all types of communication equipment 1ksS AFWL/WO SWEH~2 -003h) Ww aw.