The D.C. Navy Yard is on lockdown after a gunshot was reported in building 197.
Thousands of employees are set to return to work inside the building at the Navy Yard where 12 people were shot and killed in September 2013.
Survivors and families of those killed in the Washington Navy Yard shootings are gathering for ceremonies of remembrance.
The Washington Navy Yard is marking its history with the War of 1812.
About 2,700 workers displaced by the Washington Navy Yard shootings last year will begin returning to the renovated building in February, Navy Vice Admiral William Hilarides said Thursday.
Annual summer arts performances at Metro stations are starting.
Officials are renaming the Washington Navy Yard building where a gunman fatally shot 12 people in September before he was killed by police.
The U.S. Navy says it will add a new main entrance and a memorial area to the building in Washington where a gunman killed 12 workers in September.
The Florida family of a woman slain during the mass shooting at the Washington Navy Yard is the first to file a lawsuit against the government and defense contractors.
The company that employed the Washington Navy Yard shooter pulled his access to classified material for two days in August when mental health problems became evident, but restored it quickly and never told Navy officials about the withdrawal, The Associated Press has learned.