U.S. Defense Secretary Leon Panetta told Libya's new leaders - the road to stability will not be easy after 42 years of one-man rule.<br/> U.S. DEFENSE SECRETARY LEON PANETTA, SAYING:<br/> "This will be a long and difficult transition, and I have every confidence that you will succeed in realizing the dream of a government of, by and for all people and achieve a more secure and prosperous future."<br/> During the news conference with Libya's interim prime minister, Panetta said Washington is ready to help the oil-producing North African state but offered no specific aid.<br/> Libya's interim government is struggling to stamp its authority two months after the capture and killing of Muammar Gaddafi.<br/> Militias seized Tripoli during the rebellion against Gaddafi that drew NATO into an air war.<br/> Heavily armed groups still control the streets and may be holding out for their share of power in Libya's new government.<br/> Katharine Jackson, Reuters.