WASHINGTON (AP) — Military leaders are telling commanders to get their troops in line and refrain from misconduct such as urinating on enemy corpses.It's a sharp response to the tasteless photos and other disturbing examples of bad behavior that have enraged Afghans and complicated war-fighting.The broader message to shore up discipline in the ranks is expected to be made clear by Defense Secretary Leon Panetta in remarks Friday at Fort Benning in Georgia.The Army and Marine Corps chief have focused on discipline in recent talks to midlevel commanders around the country. The chiefs say they recognize that part of the problem may be leadership stumbles by the young officers who have shouldered much of the burden of wars in Iraq and Afghanistan.