After years of planning and construction delays, the National Museum of the U.S. Army will open next June. It is billed as the first in the nation to tell the 244-year-old story of the Army and the 30 million soldiers who have served since 1775. The opening date has been postponed several times, but the Army said in a news release Wednesday that this time it's going to happen: On June 4, the doors will open to the 185,000-square-foot main building on an 84-acre campus at Fort Belvoir, Virginia, about 30 minutes south of Washington, D.C. The museum, located on a publicly accessible section of Fort Belvoir, plans to be open 364 days a year, the only exception being Christmas Day, to an expected 750,000 visitors annually. Tickets for admission are free, but the Army and the Army Historical Foundation have yet to straighten out how ticketing will work. Read more on Military.com.