11. Twelve thousand aerial mines were laid, a significant barrier to Japan's access to outside resources. 12. On 20 April 1951 the primary mission for VP-47 was changed from ASW to aerial mining . 13. The wing further expanded its mission in 1987 to include conventional bombing, sea search and surveillance, and aerial mining . 14. In 1935 he claimed that he worked on aerial mines and in 1937 that he had invented a system for detecting submarines. 15. First the roofs and windows of the old town were destroyed with 256 heavy bombs and aerial mines ( 396 tons ). 16. In 1987, the wing's mission expanded to include conventional bombing, sea search / surveillance, and aerial mining . 17. In more recent years, Lake George has been home to an operational U . S . Military bombing and aerial mining range. 18. The damage was mainly caused by two aerial mines ; large bombs dropped by parachute and fused to explode before hitting the ground. 19. The US Navy lacked suitable aircraft . Johnson set about convincing General Curtis LeMay of the efficacy of very heavy bombers laying aerial mines . 20. A resource on the history of aerial tramways in the mining industry is " Riding the High Wire, Aerial Mine Tramways in the West"
