How the United Center is converted from ice to hardwood

Chicago Tribune:

For the Bulls and Blackhawks to share the floor at the United Center, it takes a choreographed conversion from ice to hardwood and back again — something that will happen 26 times this season. Once a Blackhawks game ends, the crew of 45 springs to action, changing the playing surface in about two hours.

Fascinating video and description of the process of turning a hockey rink into a basketball arena.