 One. One. Millions of Americans will be packing the airports today ahead of the 4th of July holiday. The TSA says it expects to screen over 32 million flyers now through Monday, July 8th, and that today will be the peak day for holiday flights, with over 3 million flyers expected. Get ready for the rock event of the summer. Def Leppard. Journey. Together with special guests, Cheap Trick.