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President Donald Trump has unveiled a $22.5 billion reconstruction of Washington Dulles International Airport.

Some shit you should know before you dig in: Dulles opened in 1962 and sits about 25 miles outside Washington in northern Virginia. Congress signed off on a 50-year lease that hands operations to the Metropolitan Washington Airports Authority, and United Airlines runs roughly 70% of the traffic moving through there. The airport is pretty dated and many complain about its layout. One of the biggest pain in the asses about the airport is getting to the different terminals, which require passengers to board “mobile lounges,” Chrysler-designed vehicles that haul people across the tarmac and can drop them as much as half a mile from their gate. There are 19 of them, each carrying up to 102 passengers, and one went down in November and put 18 people in the hospital. None of that has slowed the place down. Passenger traffic at Dulles grew faster last year than at any other large US airport, hitting a record 29 million, a 6.4% jump.

What’s going on now: Trump laid out the plan in the Oval Office with a laser pointer and a set of renderings, flanked by Transportation Secretary Sean Duffy and United CEO Scott Kirby. The redevelopment will include 5 million square feet of new or renovated space, demolition and replacement of Concourses C and D, an expanded main terminal, new AeroTrain connections, a central walking tunnel, a new US Customs facility, a rebuilt baggage system, and a parking garage with 32,000 spaces.

“It’s considered one of the worst airports anywhere in the world, we’re going to make it maybe the best with some hard work,” Trump said, calling the moment right for “a major and long overdue renovation and reconstruction of Washington’s really horribly-thought of Dulles.”

The mobile lounges get swapped for what Duffy called a “horseshoe rail system.” Airport authority CEO Jack Potter said his agency, United, and the other carriers have agreed to fund the project. “So this is not requiring federal dollars,” Potter said. “This is going to be airport-generated dollars, airline contributions, which is phenomenal.”

This all comes as Trump stacks up construction projects around Washington including a new White House ballroom, a renovated Lincoln Memorial Reflecting Pool, and a proposed triumphal arch, other beautification projects in the greater region.