WASHINGTON - Libyan leader Muammar Gaddafi is not close to a military breaking point even though coalition strikes have seriously degraded his fighting power, the top US military officer told Congress on Thursday."We have actually fairly seriously degraded his military capabilities. ... We've attrited his overall forces at about the 20- to 25-percent level," Admiral Mike Mullen, chairman of the US Joint Chiefs of Staff, told lawmakers."That does not mean he's about to break from a military standpoint, because that's not the case."Mullen and Defense Secretary Robert Gates appeared before lawmakers almost two weeks after Western nations launched a military campaign aimed at protecting civilians in Libya from Gaddafi's loyalist forces.