Dick Cheney wrote secret resignation letter in 2001 and kept it locked in a safe
Dick Cheney (Screenshot)

Shortly after taking office, former Vice President Dick Cheney delivered a wrote of resignation in light of his poor health.

"Basically, what I did was I resigned the vice presidency effective March 28, 2001," Cheney told Sanjay Gupta Sunday on "60 Minutes."

The former vice president said he wrote the letter because there was no constitutional provision to replace an incapacitated vice president.

Cheney said in 2011 that he kept the resignation letter locked in a safe.

The former vice president suffered his first heart attack at 37. At the time, he was campaigning for Congress.

Cheney suffered three more subsequent heart attacks before becoming vice president.

Watch video, courtesy of CBS News, below: