US Open stadium to have roof by 2017 tourney - The San Diego Union-Tribune
How the U.S. Open Tennis Stadium's Retractable Roofs Work
USTA History
USTA Arthur Ashe Stadium
USTA NATIONAL TENNIS CENTER - CxRA
Retractable Roof Among the Many Upgrades Unveiled for U.S. Open – New York Tennis Magazine
US Open celebrates 50th Anniversary at renovated USTA Billie Jean King National Tennis Center
Up on the roof at the US Open - WAG MAGAZINE
AP PHOTOS: US Open roof taking shape in New York
How the U.S. Open Tennis Stadium's Retractable Roofs Work
Arthur Ashe Stadium is taking on a new look for the 2015 U.S. Open