21. The air search continued Tuesday night and was to resume Wednesday morning, police said. 22. The army mounted a land and air search to find the three missing soldiers. 23. "We've called off the air search and the boat is coming in as well," 24. Three survivors were spotted on the ground during an air search on 17 May. 25. Exhaustive ground, sea and air searches were unsuccessful in finding him, the Defense Department said. 26. Despite a massive international air search , nothing is found. 27. On Tuesday night, organizers said that air searches for Roufs had become " useless ." 28. On November 24, 1972, after proceeding for 39 days, the air search was called off. 29. The British Types 281, 291 and the American SG radars were used for air search . 30. A type 21 air search radar was also fitted.