Pentagon: The Pentagon is visible from Interstate 395, between exits 9 and 10, traveling south on the west side of the highway. Or take the Metro to Pentagon or Pentagon City; you can view the site

Pentagon: The Pentagon is visible from Interstate 395, between exits 9 and 10, traveling south on the west side of the highway. Or take the Metro to Pentagon or Pentagon City; you can view the site from Army-Navy Drive or from Arlington National Cemetery.
Arlington National Cemetery: Opens 8 a.m. daily; closes at 7 p.m. April 1 through Sept. 30 and at 5 p.m. other times of the year. Paid parking available on site, or use the Arlington National Cemetery Metro stop; www.arlingtoncemetery.org or (703) 607-8000.
National Law Enforcement Memorial: Located on E Street between Fourth and Fifth streets, at the Judiciary Square stop on the Metro Red Line. The Visitor Center, at 605 E. St. N.W, two blocks from the memorial, is open Monday to Friday, 9 a.m. to 5 p.m.; Saturday 10 a.m. to 5 p.m. and Sunday, noon to 5 p.m; www.nleomf.com or (202) 737-3213.
National Fallen Firefighters Memorial: Monument located outside the National Fire Academy, 16825 S. Seton Ave., Emmitsburg, Md.; www.firehero.org or (301) 447-1000.
National Air and Space Museum's Uvdar-Hazy Center: Located next to Dulles International Airport in Chantilly, Va., 28 miles west of the National Air and Space Museum on the National Mall. Open 10 a.m. to 5:30 p.m. daily. Admission is free but parking costs $12; roundtrip shuttle from the downtown museum is $7. Contact www.nasm.si.edu/museum/udvarhazy/ or (202) 357-2700.