Military personnel accidentally triggered Air Force One emergency slide ahead of Trump's flight to Dallas

The useful part

Military personnel accidentally triggered an inflatable slide attached to President Donald Trump's Qatari-donated Air Force One plane Wednesday, a person briefed on the matter told NBC News. The slide inflated just before Trump was set to board the plane and head to Dallas for the GOP midterm convention. Instead of immediately exiting Marine One to board the plane as he usually does, Trump remained on the helicopter for several minutes.

How it works

• He eventually walked out on the tarmac while officials looked at the slide, telling reporters that they were just "checking the slide." "As the President has said, the slide was checked out to make sure...
• They want to make sure everything works perfectly," he said.
• "Air Force One is on its way to Dallas so he can deliver his much-anticipated speech to a raucous and sold-out crowd." Trump told reporters before he boarded that there were no security concerns.

Details worth keeping

"No, they were checking it before, and they just wanted to make sure. So they've — I guess they've already put it up.