Article Photos: Devon Energy celebrates new headquarters opening in downtown Oklahoma City 9/9

Larry Nichols, center, Devon Energy Corp. executive chairman, pulls a pin on a ribbon Tuesday at the Devon Energy Center in Oklahoma City. From left are Mayor Mick Cornett, Devon President and CEO John Richels, Nichols, Gov. Mary Fallin and building architect Jon Pickard. After six years of planning and three years of construction, Devon Energy held a ceremony commemorating completion of the center.  Photo by Paul B. Southerland, The Oklahoman