 Retired agent Robert McDonald. The Secret Service, based upon the events over the weekends, going to double and triple check, tighten up and make sure that everything is squared away. President Biden spoke from the Oval Office last night. You know, the political record in this country has gotten very heated. It's time to cool it down. We all have a responsibility to do that. A Marine veteran and volunteer firefighter was killed in the gunfire. CBS News special report. I'm Deborah Rodriguez.