During the 2000s the FIA and its president became increasingly embroiled in controversy over Formula One, while facing threats from teams to establish a breakaway series. A grouping of the car manufacturers involved in F1, the Grand Prix Manufacturers Association, proposed a new world championship, which would allow them greater control over the regulations and revenue distribution. A new Concorde Agreement eventually ended the threat, but the breakaway series would resurface during each dispute between the FIA, teams and the Formula One Group. The FIA's handling of the tyre situation at the 2005 United States Grand Prix was criticised. Mosley had refused any modification to the circuit or the holding of a non-championship event in place of the Grand Prix, having stated that running on an untested circuit was unsafe. The FIA also threatened to punish the teams who withdrew from the event, but later cleared the teams of any wrongdoing.