In a photography forum, Surapon recounts the sad story of how the TSA took away his Giottos AA1900 Rocket Air Blaster, a blower for removing dust from equipment, at an airport in New York.
According to him, he was on his way back to North Carolina from Greece when the TSA flagged his camera-case for manual inspection. The TSA agent reportedly produced the rocket-shaped blower, and then he and a colleague grimly pronounced the dangers of this object, should it be filled with gunpowder and then launched like a rocket through the cockpit.
Since then, Surapon assiduously sliced the decorative fins off his blowers, and has had no further trouble from the TSA.
My New and Improve GIOTTOS Blower-for safety. (Thanks, Visionrouge!)