“…In addition, the paper compares the analyses of these 2009 events with several previously examined NSSEs. The previously examined NSSEs were prior UNGA meetings (in 2007 [1] and 2008 [2]), and the Democratic and Republican National Conventions held during 2008 [3]. Some observations of trends identified across multiple events are discussed in this paper; in particular, the three UNGA meetings yielded interesting findings as similar security measures were applied to the same airspace for all three events.…”