a ; HL +: 4 ? , . 152 A practice for TEAK was conducted on 21 July, and a rehearsal on 26 July. On the rehearsal, particularly, aspects of the operation were suc- cessfully executed. The TEAK event occurred on 1 August 1958 (See addi- tional information on TEAK in "Shots and Aircraft Participation," this chapter.) The plan for ORANGS, the very high altitude shot, was virtually identical to that for TEAK, involving the same numbers and types of aircraft. Largely because of the general success of the TnAK practice, renearsal, and event, a decision was made early in August to conduct only a4 rehearsal prior to the ORANG event. This rehearsal was held on 8 August, and tite shot was fired on 11 August 1958. (See additional information on ORANG in "Shots and Aircraft Participation," tais chapter.) D, SHOT REHBARSALS Seon after the Air Operations Center at kniwetok became operational, a series of rehearsals in preparation for the shot events was begun. Sev- eral practices involving individual aircraft and small groups of aircraft also were conducted, These practices and rehearsals, in general, were performed to test various aspects of the communications and control systems, of aircraft positioning, and of related functions, and to orientate per~ sonnel in preyer methods and procedures of operation, The rehearsal period got underway on 21 March 1958 anda concluded on the day of the firing of the YUCCA device, 28 april 1958. In all, 13