The 30-second video pieces together surveillance video from the morning of Sept. 16 showing Alexis arriving at the secure Washington, D.C. scene in a rental car, walking into the building and then pulling out his shotgun.
President Barack Obama spokes Sunday at a memorial service honoring the 12 victims who were gunned down last week at the Washington Navy Yard by a New York-born gunman.
The Navy installation re-opened at 6 a.m. Thursday. Navy spokeswoman Lt. Cmdr. Sarah Flaherty said Thursday will be a regular work day, except for Building 197, where the shootings occurred.
The gunman in Monday’s Washington Navy Yard massacre left behind two short phrases etched into the side of his shotgun, sources told CBS News.
Monday’s onslaught at a single building at the highly secure Navy Yard unfolded about 8:20 a.m. in the heart of the nation’s capital, less than four miles from the White House and two miles from the Capitol.
At least one gunman opened fire inside a building at the Washington Navy Yard Monday morning and officials said at least 12 people were killed and several more wounded, including a law enforcement officer.