Washington, D.C., Mayor Vincent Gray, right, and D.C. United Managing Partner Jason Levien, center left, sign a deal to build a 20,000-seat soccer stadium for D.C. United in Southwest Washington just blocks from Nationals Ballpark, Washington, D.C., Thursday, July 25, 2013. (Andrew Harnik/The Washington Times)

Photo by: ANDREW HARNIK

Washington, D.C., Mayor Vincent Gray, right, and D.C. United Managing Partner Jason Levien, center left, sign a deal to build a 20,000-seat soccer stadium for D.C. United in Southwest Washington just blocks from Nationals Ballpark, Washington, D.C., Thursday, July 25, 2013. (Andrew Harnik/The Washington Times)