Article Photos: Oklahoma tornadoes: OU's Merv Johnson 'was extremely lucky, but I wasn't very smart' with weather decisions 476/505

A man uses a chain saw to cut branches from a fallen tree on the roof of this home on US 177 north of I-40.  A tornado caused extensive damage along I-40 at the junction with  US 177 on the west side of Shawnee Sunday evening,  May 19,  2013.  Photo  by Jim Beckel, The Oklahoman.