Red Bull faced scrutiny over suspected ride height adjustments ahead of the US GP. An FIA investigation cleared them, but lingering questions keep the paddock buzzing.

Formula One's governing body on Saturday ruled out a deeper investigation of Red Bull's ride-height device while recognising it could not be sure there had been no breach of the rules in the past. The device,

Christian Horner defends Red Bull Racing against rival teams' "paranoid" claims following the FIA's investigation.