Columnist, retired neurosurgeon and possible presidential candidate Ben Carson speaks at the Conservative Political Action Conference (CPAC) in Oxon Hill, Maryland, March 8, 2014. CPAC closes after 3 days where thousands of conservative activists, Republicans and Tea Party Patriots gathered to hear politicians, presidential hopefuls, and business leaders speak, lobby and network for a conservative agenda, looking to Congressional gains in 2014 and a Republican president in 2016. REUTERS/Mike Theiler (UNITED STATES – Tags: POLITICS MEDIA) – RTR3G9D5