Updated on: April 26, 2026 / 1:46 PM EDT / CBS News Add CBS News on Google The following is the transcript of the interview with CBS News national security contributor Sam Vinograd and CBS News law enforcement analyst AT Smith that aired on "Face the Nation with Margaret Brennan" on April 26, 2026. MARGARET BRENNAN: We turn now to Samantha Vinograd. She was a top homeland security official in the Biden administration. Is now a national security contributor here at CBS and AT Smith is a former deputy director of the secret service and now a CBS law enforcement analyst and joins us from Greenville, South Carolina. Good to have you both here. Sam, you were in the room with us, sheltering with some of our colleagues, as I understand it, you were close to the perimeter and able to detect some of what was happening. I was struck, national guard was there, secret service was there, private security was there, national guard was there. The perimeter of the security went out pretty darn far.…