How large is the memorial that forms the boundary of Constitution Gardens on the west  ?
Vietnam Veterans Memorial: The Vietnam Veterans Memorial is a 2-acre (8,000 m²) national memorial in Washington, D.C. It honors U.S. service members of the U.S. armed forces who fought in the Vietnam War, service members who died in service in Vietnam/South East Asia, and those service members who were unaccounted for (missing in action, MIA) during the war.
i don't know