On the morning of September 11, 2001, now President Joe Biden was riding his beloved Amtrak from Wilmington to Washington and talking on the phone to his wife.
'Oh my God. Oh my God. Oh my God,' Dr. Jill Biden yelled into the phone.
One commercial airplane had already slammed into the North Tower at the World Trade Center in New York City. She exclaimed when a second followed.
'Jill, what is it?' Biden, then a U.S. senator from Delaware, asked his wife.
'Another plane ... the other tower,' she responded.Insurance Loans Mortgage Attorney Credit Lawyer
CNN dug up the president's experience on 9/11, as he's set to mark the 20th anniversary of the terror attacks with visits to Ground Zero, Shanksville, Pennsylvania and the Pentagon on Saturday.
Then Sen. Joe Biden (right) appeared on ABC News after the Pentagon was attacked in Washington and argued that Congress should get back in session and President George W. Bush should return to the White House
Dr. Jill Biden was on the phone with now President Joe Biden when Flight 174 crashed into the South Tower on 9/11. 'Oh my God. Oh my God. Oh my God,' she exclaimed
Biden recounted 9/11 in his 2007 memoir, 'Promises to Keep: On Life and Politics,' which he published in advance of his 2008 presidential run.
He wrote that he was trying to project strength and help unify the American people on that fateful day.
When Biden arrived at Union Station, Flight 77 had already disintegrated into the side of the Pentagon, and Washington was masked with a smoky haze.
He headed several blocks to the U.S. Capitol Building, ignoring protests over the phone from his daughter Ashley, arguing it was the safest place to be that day.
'Damn it, I want to go in,' Biden told a police officer who refused his access to the building.Insurance Loans Mortgage Attorney Credit Lawyer
Congressional leaders, at that point, had been moved to a secure location.
Meanwhile, President George W. Bush was on Air Force One and Vice President Dick Cheney was in the White House bunker.
Biden wrote in his memoir that it was important to 'show the country we were still doing business.'
Linda Douglass, who was an ABC News reporter at the time, told CNN