Aramark employees James Voyce, center, and Nick Gurule, left, thoroughly clean the windows in all the luxury suites on the second level of Sports Authority Field at Mile High in Denver on Tuesday September 4, 2013. They, and hundreds of others, were preparing the stadium to make it look it's best for the NFL season opener when the Denver Broncos take on the Baltimore Ravens Thursday night. Photo by Helen H. Richardson/The Denver Post ( cd05BRONCOS_HHR_7911 )