Museum Guards Trained for Tragedy

The U.S. Holocaust Memorial Museum can have as many as 4,000 visitors a day.

In the aftermath of the deadly shooting, security experts say the guards did the right thing. They stopped the shooter before he could harm others. One guard paid for it with his life.

George Washington University's Deputy Director of the Homeland Security Policy Institute says the Feds learned a lot about securing federal buildings after the domestic terrorism attack in the Oklahoma City bombings back in 1995.

Dan Kaniewski says those plans were revamped after the 911 attacks, too. Officers of multiple agencies train and run drills on scenarios just like the Holocaust attack.