I went to a family reunion in which someone set up a fireworks display, and I photographed it from about fifty feet away. I got through Rochester/Monroe County International, NY, (ROC) with my camera OK. However, at LaGuardia, they took a swab--the bomb/explosives check. The lens cap came back positive, and I had to take out all my carry-on photo equipment, and they checked everything twice with newly open swabs, checked my shoes, and gave me the evil arched eyebrow. Nothing else came up positive, but it took them about twenty extra minutes I'm glad I had to convince them I was OK (I am). My wife says it was the fireworks. Whaddya think? Will there be a few more delays this week? Has anyone thought of this, or has it happened to anyone, say, someone who went to target practice, then tried to board...?