Retired American proffessional boxer Mike Tyson signs autographs at SMS Audio booth at the 2013 International CES at the Las Vegas Convention Center on January 9, 2013 in Las Vegas, Nevada. CES, the world's largest annual consumer technology trade show, runs from January 8-11 and is expected to feature 3,100 exhibitors showing off their latest products and services to about 150,000 attendees.AFP PHOTO / JOE KLAMAR