The number of U.S. persons on the No Fly List has more than doubled since 2009, and people mistakenly on the list are denied their due process rights to meaningfully challenge their inclusion. In many cases Americans only find out they are on the list while they are traveling abroad, which all but forces them to interact with the U.S. government from a position of extreme vulnerability, and often without easy access to counsel. Many of those prevented from flying home have been subjected to FBI interviews while they sought assistance from U.S. Embassies to return. In those interviews, FBI agents sometimes offer to take people off the No Fly List if they agree to become an FBI informant. In 2010 the ACLU and its affiliates filed a lawsuit on behalf of 10 American citizens and permanent residents, including several U.S. military veterans, seven of whom were prevented from returning home until the suit was filed. We argue that barring them from flying without due process was unconstitutional. There are now 13 plaintiffs; none have been charged with a crime, told why they are barred from flying, or given an opportunity to challenge their inclusion on the No Fly List.