The day the president takes office is the day American leaders gather on a stage to welcome the transition of power, but an official is not allowed to attend.

The US stipulates that in the event of the president's inability to assume the duties, the list of people taking over his positions are vice president, the president of the lower house and the interim president of the upper house, respectively, but what if

On the inauguration day of US President-elect Joe Biden, a member of the US cabinet will be selected as the "designated survivor", to replace him as the future president in the aforementioned scenario.

This principle is applied to important events that require the participation of most senior officials, such as the inauguration and the day the president reads the Message of the Union, with the aim of preventing America from falling into disarray.

Typically, "designated survivor" is one of the officials in charge of the less important ministries in the US government such as the Department of the Interior, the Department of Transportation, the Department of Housing Development, and the U.S.

"I sat in a conference room, in front of a large TV screen and watched the ceremony going on. Due to security regulations, I could not reveal the specific location, but it was a secret and safe place."

"I also had an interesting experience on the night of 9/11/2001. I was in a secret safe place when I got a call from Vice President Dick Cheney saying 'we want you to stay there because

Jeh Johnson, the Obama administration's Homeland Security Secretary, was the "designated survivor" during Trump's inauguration in 2017. No member of Obama's cabinet continued to hold a position under Trump but at the time