Jay Leno deadpans through telling a joke on the "Tonight" show in
this May 21, 2004, file photo at NBC's studios in Burbank, Calif.
The late-night king will step down in 2009, and NBC has offered
Conan O'Brien the coveted time slot. Television insiders say the
early announcement was intended to circumvent the possibility
O'Brien would be lured away by another network.