 Complete the following phrase:  Despite the feud, Button insisted he had BARs backing, and was optimistic for the season. He was unable to deal with regulation changes concerning aerodynamics and his car lacked pace as a result. Button was disqualified from third place at the after race scrutineers found his car had a second fuel tank inside the main one, that when drained, made his car underweight. The FIA International Court of Appeal banned Button and his team from the next two races as a result. Following his return, he took the second pole position of his career in 