president for their physical and emotional scars from that day. one year later, cbs kris van cleave looks at the toll on the capitol police force. reporter: almost one year on, the u.s. capitol police department is still recovering and changing its tactics in an increasingly violent political climate. chief tom manger: could a january 6 happen again? the short answer is i don t believe so. but there could be a situation where something unexpected happens that we re not prepared for. we ve got to be in a posture where we think of everything, and that we try and prepare for everything. everything. reporter: we gained executive access to new capitol police training efforts, part of the wholesale changes under way. key intelligence is now being shared with rank and file officers and field offices have been opened in florida and california to help respond to threats against lawmakers, about 9600 last year alone. but the department still needs to hire 400 more officers, about