Originally Posted by t-rev
Flying out of IND last night. Boarding pass/ID checked up front. Once unloaded carry on and sent it through you go stand in this machine that blows air all around you and then walk through metal detector. I haven't seen this before? What does this machine do? Also wasn't asked to see boarding pass again.
You might want to visit the
Travel Safety/Security Forum here on FlyerTalk. There are several dozen threads like
this one discussing your question on the new "puffer" machines.
Happy travels.