(CNN) — “It’s not a good airport at all,” President Donald Trump said of Dulles International Airport outside Washington DC, at a Cabinet meeting Tuesday . “It’s a terrible airport.”

He’s not alone in his assessment.

Operational for 60 years, Dulles regularly makes it on worst airport lists, largely due to one of its most unusual features: the people movers, more formally known as “mobile lounges,” used to ferry passengers between gates and planes.

These cumbersome vehicles — a sort of giant bus elevated on hydraulics — became a talking point for the President’s cabinet meeting after a crash last month injured more than a dozen people. And now Trump is vowing big changes.

Mobile lounges are not the only problem. Transportation Secretary Sean Duffy later called out the airport for it

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