9 4. Shot eer me - Y ~ ECHO shot CE = weapon prototype designation), schedwled for Eniwetok Atoll, was cancelled on 12 April when it was ascer- tained that KOON data had eliminated the scientific requirement = , EE This change had no great effect upon Task Group 7.4, other than the natural lessening of requirements. was rescheduled for 16 April. On the same date UNION However, a series of postponements fol- lowed in which D-day was the 20th, 2lst, 23rd, 24th and 25th. finally detonated on the 26th. 5. UNION UNION was | Shot nated at 0610 hours on 26 April, nineteen days after KOON, on a barge in Bikini Atoll. radii of 6900 fe Faces The exact location was at an intersection of arcs with t_from Y —~J} \[The TARE-OBOE airstrip, approximately thirteen nautical miles from Ground Zero, was closed for two days afterwards while debris was removed from the runway. There were only two aborts: an IBDA B-50, with inoperative radar and VHF; and an F-8, with a wing tank that would not feed. A spare F-8&4 was airborne and returned successfully with the required samples. As usual, there was minor damage to ELAINE ONE, the effects B-36, and no damags to ELAINE TWO, the effects Be47. AFWLHC $6