31. The inspectors use the U-2 jets for aerial surveillance . 32. Floods had swept away bridges and roads and rescue services lacked aircraft for aerial surveillance . 33. In 2016, it was disclosed that he had funded continuous aerial surveillance of Baltimore, Maryland. 34. It included a German frigate with aerial surveillance gear off the Albanian port of Durres. 35. Stationed in England, he was part of team that would analyze aerial surveillance for military intelligence. 36. The report also recommended more aerial surveillance and encouraged other governments to help out with that. 37. On orders from General Billy Mitchell, Army bombers from Maryland were also used for aerial surveillance . 38. Police in helicopters are carrying out aerial surveillance , 39. Syria has said aerial surveillance is sufficient on the strategic plateau seized by Israel in 1967. 40. Syria has objected to the positioning of ground-based warning stations, saying aerial surveillance would be sufficient.