air filter boxes, one located on top of the aircraft's cabin, just back of the pilot's seat, and the other under the nose of the aircraft, The filter boxes were removed by pulling a lanyard attached to locking pins, The lanyards were secured to the aircraft fuselage during flight and were handy to ground crews, The drone unit personnel built a special rig with which to Lift the top filter box from the aircraft. The bottom filter holder was allowed to drop to the ground when the lanyard was pulled, Atomic Enerey Commission personnel then dragged the boxes some fifty feet away from the aircraft where they were disassembled to get at the paper, All the operation’, with the exception of actually taking the filter papers out of the holders and putting them into a lead sampler container, were done by hand and personnel who handled these boxes wore cotton gloves, Tongs were used to actually get the filter papers off the holders and into the containers.” Some Special Problems, During Operation SANDSTONE, radiochemical experiments with drones held a high priority. However, the "beeper® pilots aboard the B-17 control aircraft had to have light to properly place these samplers in the cloud. On the other hand, a minimm of light was necessary at the moment of detonation to accommodate yet another: important scientific experiment and compromise was needed.” While still at Eglin Air Force Base, the drone unit began flying missions to determine more precise light changes at altitude and at ground level, just as dawn approached, 57 After arrival to the islands, the drone unit began flying missions 17 AFWILY WW SWEH-2-003h ale