All three broadcast networks will broadcast today's Virginia Tech Convocation on campus beginning at 2pm.

Brian Williams, Charles Gibson, and Katie Couric will anchor on their respective networks.

"The exact end time is uncertain," an NBC alert says. "If the Special Report is still in progress at 2:35 PM, the network will fill until the top of the hour."

Williams, Gibson and Couric are each interviewing President Bush and the First Lady this afternoon...