O'Hare is near the top of another list, only this one isn't so great. The Sun-Times reports that O'Hare and Los Angeles International Airport lead the nation in firing federal government screeners that were hired with incomplete background checks, and then had to be let go after subsequent checks found problems. Even Midway had problems in the past months with having to fire screeners. Just one more thing to be wary of as you stand in line for your next flight.