At a debate last night hosted by Intelligence Squared US, syndicated columnist Deroy Murdock argued that "we want the TSA and others to recognize that the current threat to passengers and airliners comes almost exclusively from one source..." Countered former Homeland Security chief Michael Chertoff: "The problem with using racial and religious profiling is it takes you down a road to looking at people who you don't need to look at and avoiding looking at people that you should look at..."