IX were LASL's responsibility, we immediately sought a contractor who could produce them. Having previous experience with Fletcher Aircraft of Rosemont, California, we sought their aid and they accepted the contract. Shortly, we realized that they had not assigned a single engineer to the project, so we cancelled the contract and split the tank procurement into two separate contracts, Producing the section in front of the filter paper was given to specialists in working with stainless steel-~ Solar Aircraft of San Diego. The portion in the rear of the filter paper was accepted by Century Engineers in Burbank, Both outfits came through by assigning crews for round-the-clock-work and the first pair of tanks for operational testing arrived at Kirtland one week before the 926th was scheduled to depart for the proving ground. Immediately the pilots started testing operations and - vibration tests were performed by the 950th Test Group (Nuclear), Despite the terrific work load already on the 926th because of packing requirements for the test, they took on the additional testing missions, worked day and night through that entire week, and detected aerodynamic trouble in the tanks, A vortex effect developed behind the pylon housing; this hammered at the tank tail section so that it cracked. An on-the-spot modification was made, the tanks retested and the modification proved successful, Orders were sent to Century Engineers to similarly modify all tanks under production or already produced and the tanks gave their anticipated service life throughout subsequent tests. Meantime at Wamer-Robins, modifications crews were also working day and night and they too succeeded in meeting the deadline. Both accomplishments were excellent and far above the level of production ordinarily achieved. Althouptr not associated with manned aircraft sampling of nuclear clouds, an attempt to sample by use of rockets was made during GREENHOUSE, The five-inch rockets were fired from one island, were supposed to pierce the nuclear cloud and land on a third island. excellent promise. Preliminary tests showed But when the actual detonation occurred, the shock wave deflected the rockets and most of them landed in the ocean, We recovered some nose cones, tut generally so mich time was lost in locating them and in digging for 180 APWL/HO SWEH~2-003), 2"