The National Hockey League is in its second lockout in less than a decade. The league locked out players after the two sides failed to reach a new collective bargaining agreement. The previous CBA expired at 12:01 a.m. Eastern time Sunday morning.  The last work stoppage caused the league to cancel the entire 2004-05 season.  Owners and players can't agree on how to split revenue, which was at an all-time high last season. There are no new talks between the two sides planned.