Just saw this: http://www.theatlantic.com/doc/print/200811/airport-security
We took our shoes off and placed our laptops in bins. Schneier took from his bag a 12-ounce container labeled "saline solution." "It's allowed," he said. Medical supplies, such as saline solution for contact-lens cleaning, don't fall under the TSA's three-ounce rule. "What's allowed?" I asked. "Saline solution, or bottles labeled saline solution?" "Bottles labeled saline solution. They won't check what's in it, trust me." They did not check. As we gathered our belongings, Schneier held up the bottle and said to the nearest security officer, "This is okay, right?" "Yep," the officer said. "Just have to put it in the tray." "Maybe if you lit it on fire, he'd pay attention," I said, risking arrest for making a joke at airport security. (Later, Schneier would carry two bottles labeled saline solution—24 ounces in total—through security. An officer asked him why he needed two bottles. "Two eyes," he said. He was allowed to keep the bottles.)
