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Michael Schumacher

SINGAPORE , SINGAPORE - SEPTEMBER 23: Michael Schumacher of Germany and Mercedes GP is pictured after his crash during the Formula One Grand Prix of Singapore at Marina Bay Street Circuit on September 23, 2012 in Singapore, Singapore. (Photo by Vladimir Rys Photography/Getty Images)

Michael Schumacher is retiring from Formula One - again

This time the seven-time F1 champion says, ''it might be forever.''