J. Cole can't maintain momentum at Constitution Hall concert

It's been a full birthday week for rapper J. Cole, who turned 29 on Tuesday. He launched his own Dreamville label imprint and released a new mixtape, "Revenge of the Dreamers." During a show at New York's Madison Square Garden Theater, Cole's mentor, Jay Z, presented him with a gift -- the original Roc-A-Fella necklace that Jay used to wear in the 1990s.