Virginia State Route 193

Scott's Run Nature Preserve is a nature preserve in Fairfax County, Virginia, United States. Located in McLean, it is bordered by Virginia State Route 193 to its south, Interstate 495 to its east and the Potomac River to its north. It encompasses 336 acres (136 ha) of woodland with its namesake, Scott's Run, flowing through its west side. Scott's Run originates in nearby Tysons Corner and enters the Potomac on the northwest side of the preserve. The preserve is noted for including eastern hemlocks among its plant life, which are rare for the area. It is a popular destination for recreation and hiking and is operated by the Fairfax County Park Authority.

The Carderock Division of the Naval Surface Warfare Center is one of eight Naval Sea Systems Command (NAVSEA) Surface Warfare Centers. The headquarters is located in Carderock, Maryland with the historic David Taylor Model Basin. The division includes remote sites across the United States concentrating on engineering, testing and modelling ship and ship's systems for the Navy. It consists of approximately 3,200 scientists, engineers and support personnel working in more than 40 disciplines ranging from fundamental science to applied/in-service engineering.

The David Taylor Model Basin (DTMB) is one of the largest ship model basins—test facilities for the development of ship design—in the world. DTMB is a field activity of the Carderock Division of the Naval Surface Warfare Center.

Carderock Recreation Area is a 100-acre park in Carderock, Maryland, part of the Chesapeake and Ohio Canal National Historical Park. The area is well known as a destination for its outdoor activities of rock climbing, hiking and biking. It is bounded by the Potomac River on the south and the Chesapeake and Ohio Canal on the north, and it is accessed from Clara Barton Parkway from the same exit as Carderock Division of the Naval Surface Warfare Center. The Recreation Area includes a picnic shelter, section C of the Billy Goat Trail, convenient access to the Chesapeake and Ohio Canal, and popular rock cliffs. The area has a long history of climbing and is notable for being the closest significant climbing area to Washington, D.C. As such, it is one of the most climbed cliffs in the eastern United States. There is no fee to enter the park.

The Archdiocese of Washington is a diocese of the Orthodox Church in America (OCA). Its territory includes parishes, monasteries, and missions located in Washington, D.C., southern Delaware, Maryland and Virginia. From 2005 to July 1, 2009, it was known as the Diocese of Washington and New York, until the Diocese of New York and New Jersey was reestablished as a separate diocese. The archbishop of Washington is Metropolitan Tikhon (Mollard), who is also the OCA's ruling primate.

Carderock is a neighborhood located in Montgomery County, Maryland, United States, along the Potomac River. It is located in the southern part of the Potomac census-designated place and western part of the Bethesda postal area. Carderock is well known for Carderock Division of the Naval Surface Warfare Center and rock climbing at Carderock Recreation Area, part of Chesapeake and Ohio Canal National Historical Park. Carderock also includes a local school (Carderock Springs Elementary), Carderock Springs Swim and Tennis Club, and Congressional Country Club.Despite its proximity to the Capital Beltway, Carderock remains only moderately developed and traffic congested. This is due in part to the prominent presence of Rock Run, the Naval Surface Warfare Center, and Congressional Country Club. In addition, almost no roads running through Carderock have direct access to the Beltway. The only exceptions are River Road on the north end of the neighborhood and Clara Barton Parkway on the south end.

Thompson's Corner, is a small unincorporated community located in northern Montgomery County, Maryland, United States. It is located west of Clarksburg and east of Comus. The community was once marked by a house and general store on Slidell Road owned by Richard Thompson (1796-1874), a local farmer. Circa 1860, his son Jerome (1833-1905) officially founded Thompson's Corner.Through his son, Samuel, Richard Thompson is the third great-grandfather of country singer, Martina McBride.

The American Legion Memorial Bridge, also known as the American Legion Bridge and formerly as the Cabin John Bridge, is a bridge carrying Interstate 495 (Capital Beltway) across the Potomac River between Montgomery County, Maryland and Fairfax County, Virginia in the United States. It is an American Water Landmark. Plummers Island is located immediately downstream of the bridge. The bridge has five traffic lanes in each direction. The outermost lane in each direction is an entrance/exit-only lane for traffic to/from the Clara Barton Parkway in Maryland and the George Washington Memorial Parkway and Georgetown Pike (State Route 193) in Virginia. There are no facilities for pedestrians or cyclists, which are prohibited.

The National Counterterrorism Center (NCTC) is a United States government organization responsible for national and international counterterrorism efforts. It is based in Liberty Crossing, a modern complex near Tysons Corner in McLean, Virginia. NCTC advises the United States on terrorism. Part of the Office of the Director of National Intelligence, the center brings together specialists from other federal agencies, including the CIA, the FBI, the Department of Defense, and the Department of Homeland Security.

The National Counterproliferation and Biosecurity Center (NCBC) is the primary organization within the United States Intelligence Community for combating the spread of weapons of mass destruction and their delivery systems.NCBC works with the Intelligence Community (IC) to identify critical intelligence gaps in counter-proliferation collection or analysis and then develops solutions to help close those gaps. NCBC also works to find and fund new technologies to help combat proliferation. Additionally, NCBC works to identify "over the horizon" proliferation concerns and creates strategies to ensure that the IC is well-positioned to address them.

The 1964 U.S. Open was the 64th U.S. Open, held June 18–20 at the Blue Course of Congressional Country Club in Bethesda, Maryland, a suburb northwest of Washington, D.C. Ken Venturi won his only major title, four strokes ahead of runner-up Tommy Jacobs.Jacobs held the 36-hole lead after shooting a 64 (−6) in the second round, tying the U.S. Open record at the time for a round, set by Lee Mackey in 1950. In the third round on Saturday morning, he carded an even-par 70 and retained the lead after 54 holes, two strokes ahead of Venturi, who made up four shots with a 66 (−4). Masters champion Arnold Palmer had led after the first round, but hopes of a grand slam faded with a 75 in the third. Before the final round began on Saturday afternoon, Venturi was advised by doctors to withdraw from the tournament. He was suffering dehydration due to an oppressive heat wave and had to take treatments with tea and salt tablets in between rounds. To play the final round, doctors warned, was to risk heat stroke. Venturi, however, ignored the advice and played on, then shot a 70 to Jacobs' 76 to claim a four-stroke victory. Venturi's score of 206 over the final 54 holes set a new U.S. Open record, as did his score of 136 over the last 36. The win was his first on tour in four years. Future champion Raymond Floyd made his U.S. Open debut this year at age 21 and finished in 14th place. He played the final two rounds on Saturday with Venturi. This was the last time the championship was scheduled for three days (the final two rounds scheduled on Saturday); the next year it was expanded to four days, concluding on Sunday. The Blue Course at Congressional was the longest in U.S. Open history to date, at 7,053 yards (6,449 m). A lack of rainfall in the previous six weeks reduced its effective length, and it played firm and fast.

Plummers Island is a 12-acre Potomac River island in Montgomery County, Maryland, about nine miles upriver from Washington, D.C. The Washington Biologists' Field Club has called the island "the most thoroughly studied island in North America". The island is visible from the American Legion Memorial Bridge of the Capital Beltway, just downriver (east) of the bridge. Scientific study of Plummers Island began in 1899, when botanist Charles Louis Pollard formed the Washington Biologists' Field Club and began the search for a field camp near the club's Washington, D.C. home. The club leased the island in 1901, and bought it seven years later; the island is now owned by the U.S. National Park Service, located within Chesapeake and Ohio Canal National Historical Park.A 2008 issue of the Bulletin of the Biological Society of Washington was dedicated to articles about the flora and fauna of the island. The study of the island's three main plant communities, riparian, terrace, and upland forest, documented 3,012 insect species in 253 families, in 18 orders: Collembola, Odonata, Dermaptera, Blattodea, Phasmatodea, Orthoptera, Psocoptera, Thysanoptera, Hemiptera, Neuroptera, Megaloptera, Coleoptera, Mecoptera, Trichoptera, Lepidoptera, Diptera, Siphonaptera, and Hymenoptera. Another of the studies reported 19 species of freshwater mollusks (7 bivalves, 12 gastropods) in the island's immediate area, bringing the total known for the Middle Potomac River to 42 species. A periodically updated checklist which includes all the vascular plants of the flora, including ferns, fern allies, gymnosperms, and flowering plants, that have ever been reported growing in the wild on the island and its adjacent mainland, totals 885 plant species, of which 704 are native, and 181 naturalized.