AFP: US defense leaders pushed back Thursday against Republican senators opposed to allowing gays to serve openly in the military, saying troops are ready for the change. The US military's top officer, Admiral Mike Mullen, and Defense Secretary Robert Gates pointed to a new Pentagon study as proof the armed forces would not suffer a traumatic upheaval if the gay ban was lifted, as some conservative lawmakers have warned. "I believe that in the long run, repeal of this law makes us a stronger military and improves readiness. It will make us more representative of the country we serve," Mullen told the Senate Armed Services Committee. Mullen and Gates also rejected Republican senators' argument that the change should be postponed in wartime.