Girls leap through a wall of water , at Yards Park in Washington, D.C. 女孩跳躍過水牆

Jacquelyn Martin / AP
Heat wave blankets U.S. Northeast for second day - PhotoBlog http://photoblog.msnbc.msn.com/_news/2012/06/21/12344321-heat-wave-blankets-us-northeast-for-second-day?lite