1. In 1924, the Institute for Government Research, which later became known as the Brookings Institution, was established in Washington, D.C. The organization conducts research on various policy issues and is considered one of the most influential think tanks in the world.

2. On June 2, 1953, Queen Elizabeth II visited Washington, D.C. for the first time during her reign. She met with President Dwight D. Eisenhower and addressed a joint session of Congress.

3. In 1976, the U.S. Capitol Visitor Center, which serves as the main entrance for visitors to the Capitol Building, was authorized by Congress. However, construction did not begin until 2001, and the center did not open until 2008.

4. The DC United soccer team won the MLS Cup on June 2, 1996, defeating the Los Angeles Galaxy 3-2. This was the first championship for the team, which had only been in existence for one season.

5. On June 2, 2015, a fire broke out in the Washington National Cathedral causing significant damage to the roof and interior. The cathedral, which is one of the largest Gothic structures in the country, underwent a major restoration project following the fire and reopened to the public in 2020.