The UK had considerable experience with barrage balloons during the Second World War but the proposed use of balloons to carry warheads to a higher altitude than achievable with a tower was an innovation for Operation Antler. Use of balloons did away with the engineering effort to build towers, and allowed a test site to be re-used, saving on the effort to construct instrumentation sites and lay cables. Most importantly, whereas low-level detonations sucked up contaminated radioactive dirt from the ground and the vaporised tower, a high-altitude detonation created fallout only from the bomb itself, and were therefore much cleaner. While accepting this point, the AWTSC was apprehensive about the consequences of a runaway balloon carrying a live atomic bomb. Bill Saxby and J. T. Tomblin from Aldermaston and an RAF balloon expert visited the Nevada Test Site to observe the work Americans were doing with balloons, and it was suggested that Titterton should also visit Nevada. Safety procedures were developed that included, in an extreme circumstance, shooting down the balloons. Titterton and Beale then accepted the use of balloons.