WASHINGTON, Jan. 11 (UPI) -- Machines to screen airline passengers can store and transmit images, making them open to possible abuse, a U.S. group critical of full-body scanning says. The federal Transportation Security Administration currently has about 40 body-scanning machines in operation at 19 U.S airports and wants to add 150 more this year and 300 in 2011, CNN reports. TSA says the scanners are not networked and that each machine works independently without the ability to store or send graphic images of human anatomy.