The United States men's national ice hockey team is based in Colorado Springs, Colorado, with its U18 and U17 development program in Plymouth, Michigan. The team is controlled by USA Hockey, the governing body for organized ice hockey in the United States. The U.S. team is currently ranked 4th in the IIHF World Rankings. The U.S. is one of the most successful national ice hockey teams in the world and a member of the so-called "Big Six", the unofficial group of the six strongest men's ice hockey nations, along with Canada, the Czech Republic, Finland, Russia, and Sweden.