A Delta flight crashed then flipped upside down while landing in ...

A Delta Air Lines flight from Minneapolis crashed, turned upside down and caught fire on the runway at Toronto Pearson International Airport while attempting to land Monday, the latest in a string of passenger plane crashes since December.

All 80 people on board the CRJ900 twin-jet aircraft survived, but 21 people were taken to hospitals with injuries, Delta said in a statement. All but two had been released from the hospital as of Tuesday morning, Delta said.

Video obtained by CNN shows the rear landing gear of the jet buckling and the right wing shearing away in a fireball after the plane landed hard on the runway.

The plane briefly skids on its belly before rolling over, sending smoke and powdery snow shooting into the air.

“Oh, no, no, no, no, no!” says the person taking the video, watching from inside a different plane near the runway.

“When we hit, it was just super hard. It hit the ground, and the plane went sideways,” said passenger John Nelson, adding, “It’s amazing that we’re still here.”

“Even now I smell like jet fuel,” Nelson told CNN on Monday night.

By Tuesday afternoon, the plane wreckage was barely recognizable, camouflaged against the ground by snow plastered across the frozen fuselage, its left wing crumpled and right wing missing.

Monday’s crash is the latest incident in a deadly year for air travel in North America. Earlier this month, 10 people were killed when a regional airline plane crashed in Alaska.

Less than three weeks ago, 67 were killed when an American Airlines plane collided midair with a US Army Black Hawk helicopter near Washington, DC. Two days later, a medevac jet crashed in Philadelphia, killing all six on board and one person on the ground.

Those disasters were preceded by deadly crashes in December in South Korea and Kazakhstan.

Here’s what we know:

All 80 passengers and crew survived

Delta Flight 4819, operated by Delta subsidiary Endeavor Air, departed from Minneapolis/St. Paul International Airport and crashed at the airport, located mostly in the suburb of Mississauga west of Toronto, around 2:15 p.m. ET Monday, Delta said in a statement.

“The hearts of the entire global Delta family are with those affected by today’s incident at Toronto-Pearson International Airport,” said Delta CEO Ed Bastian. “I want to express my thanks to the many Delta and Endeavor team members and the first responders on site.”

“I’m incredibly proud of the professionalism of the Endeavor crew members who evacuated the aircraft, as well as the first responders at Toronto Pearson International Airport and the airport leadership team,” Bastian added in a memo to Delta employees obtained by CNN Tuesday.

Deborah Flint, the president and CEO of Toronto Pearson International Airport, also credited the “textbook response” of first responders for helping prevent loss of life.

Hard landing left passengers ‘upside down hanging like bats’

Pete Koukov, a passenger on the plane, said he “didn’t know anything was the matter” until they were on the ground.

“We hit the ground, and we were sideways, and then we were upside down hanging like bats,” Koukov told CNN’s Brianna Keilar.

“I took my seat belt off, which I’d obviously left fastened for the landing, and as I took it off, crashed down on to the ceiling which had become the floor,” Pete Carlson, another passenger who is an executive with a Minneapolis health care company, told CNN newsgathering partner CBC.

Paramedics who responded to the crash treated multiple types of injuries, including back sprains, head lacerations and nausea due to jet fuel fumes, said Cory Tkatch with Peel Regional Paramedic Services.

Video of the crash does not appear to show the usual “flare” of the jet, where the pilot pulls the nose up just before landing, exposing the wings to more air resistance.

“There was no attempt to flare at all, which slows the plane down,” said CNN aviation analyst Mary Schiavo, a former inspector general of the Department of Transportation.

Koukov said he was able to unbuckle his seat belt, push himself to the ground and then walk out of the plane, but some others needed help getting down from their seats.

“Just feeling lucky and happy I got to give the person I didn’t know sitting next to me a big hug, that we were OK, and see my friends who are here to pick me up from the airport and give them a big hug,” he said.

Why did the plane overturn?

The crash happened on a gusty day following heavy snowfall.

“On Thursday and Sunday, we got more than 20 inches of accumulated snow,” Flint said Tuesday. That’s more snowfall than the area received all of the previous winter.

“What we can say is the runway was dry, and there was no crosswind conditions,” said Todd Aitken, the airport fire chief, Monday evening.

However, an air traffic controller told the Delta pilot there were winds of 26 mph, gusting up to 38 mph, blowing across the plane’s path at a 40-degree angle, according to a recording of airport tower radio traffic. The wind at Pearson was reportedly blowing snow into the air with a visibility of 5 miles.

Aitken, in a Tuesday briefing, declined to speak more on the weather conditions, deferring further questions due to the ongoing investigation.

The weather conditions may have become treacherous before the pilots were able to adapt, said retired jet pilot Les Abend.

“With blowing snow, it may have changed rapidly, so the airplane that landed ahead of this aircraft may have had a different condition than this particular Delta regional jet,” Abend told CNN’s Kayla Tausche on Tuesday.

Videos of the crash could explain why the aircraft overturned after landing, according to former director of the FAA’s Office of Crash Investigation Steven Wallace.

“You see the right wing fails, but the airplane is still going quite fast, and that left wing is generating a tremendous amount of lift,” Wallace told CNN’s Pamela Brown. “So that immediately causes the airplane to roll inverted. That’s quite clear.”

The runway where the plane crashed is expected to remain closed through at least Thursday evening, according to a notice issued to pilots Tuesday.

“We do expect that the investigators on-site will be reviewing the aircraft on its current configuration on the runway for the next 48 hours,” Flint said Tuesday.

The last major aviation accident at the Toronto airport was nearly two decades ago, on August 2, 2005, according to The Associated Press, when an inbound Air France flight from Paris slid off the runway and burst into flames. All 309 people on board survived.

The Transportation Safety Board of Canada is leading the investigation with help from the National Transportation Safety Board in the US.

Correction: An earlier version of this story incorrectly described the location from which a video of the crash was taken. It was taken from a plane near the runway.

CNN’s Taylor Ward, Tara John, Alexandra Skores, Mitchell McCluskey, Amir Vera, Taylor Romine, Amanda Jackson, Elise Hammond and Karina Tsui contributed to this report.