TSA PRE is a new initiative being tested in which pre-screened passengers can go through security without taking off shoes and without taking laptops or liquids out of their bags. I’ve been lucky enough to go through TSA PRE in Detroit’s McNamara terminal twice now and I can happily report it is awesome. No lines. Shoes stay on. Laptop and liquids stay in bag. What’s not to love? You can read more about TSA PRE here: http://www.tsa.gov/what_we_do/escreening.shtm