A graphic released by the TSA earlier this year announced coming changes to the agency's Prohibited Items List, which it said would allow small knives. The TSA now says those items will remain banned from carry-on bags. TSA hide caption

itoggle caption TSA

A sign informs travelers about Millimeter Wave Detection technology used in full body scanners at Midway Airport in Chicago. The scanners produce less-revealing images than those that use X-rays. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images