after a planned visit with mike pompeo wasancelled last month and they've agreed to set opjoint liais office in the rth. >>> is someone spying on you when you fly? the head of the tsa is defending quiet skies. it follows them on to u.s. airports and on to plane even if they're not suspected of crime. what could get you red flagged. >> reporter: he's an armed federal air martial on the job for eight years.ca e he's under cover, were age protect his identity. >> make sure it goes wheels up to wheels down without incident. >> reporter: but the quiet skies progr propart of that assignment. if their foreign travel histories and other factors raise red flags. >> so there normal behaviors in an airport. >> reporter: they take note of r at a traveller reads, who they talk to and whetey use the restroom. two to three dozen travellers followed each day, including an american whon attended overseas craft show. >> the american public does deserve to know the extent to which they're being surveilled. >> they've made no arrested but have gathered intelligence. tprrsz. >> i am confident ruts rered d