LAS VEGAS :Formula One's governing body said it had inspected and welded loose manhole covers after practice disruption at the Las Vegas Grand Prix. Thursday's second session was twice red-flagged after a track marshal reported one of the covers was moving as cars passed over it. "The manhole that prompted the red flag in FP2 was disassembled and further inspected. A specific fault was found with the closure mechanism, and it was possible to address this issue overnight," the FIA said in a