http://abcnews.go.com/blogs/headlines/2012/08/heres-100m-now-catch-those-drug-smuggling-ultralights/

Pictures
here.

U.S. Customs and Border Patrol is spending big – just under $100
million – to combat drug smugglers who use small aircraft worth only a few
thousand dollars each to ferry narcotics into the U.S.

Last week the CBP awarded SRCTec, a New York-based research and development
company, a $99,955,087.00 contract for a real-time detection system that is
specifically designed to pick out ultralight aircraft, slow-speed rudimentary
manned planes that have a very small radar signature, on America’s southern
border.