What's it like to be the 'designated survivor' for the State of the Union?

Being the designated survivor brings extra adrenaline jolts and humbling thoughts about being unwittingly catapulted into the presidency and unthinkable tragedy.

What's it like to be the 'designated survivor' for the State of the Union?
Being the designated survivor brings extra adrenaline jolts and humbling thoughts about being unwittingly catapulted into the presidency and unthinkable tragedy.