UPDATED Video: Blake Shelton and Miranda Lambert to perform "Over You" in honor of Oklahoma on "The Voice" tonight; Swon Brothers contending on tonight's show - Article Photos 113/520

Highway Patrol troopers Randall Milan, left, and Gabe Leach work perimeter security on the north side of the tornado devestated part of Moore, OK, Thursday, May 23, 2013, Photo by Paul Hellstern, The Oklahoman