U.S. Defense Secretary Robert Gates says recent sexual abuse allegations by former and current U.S. soldiers are a "matter of grave concern" and the military has "zero tolerance" for sexual assault. His comments Wednesday came a day a group of current and former members of the U.S. military filed  a lawsuit in Virginia claiming they were sexually harassed, assaulted and raped by fellow service members while on active duty. VOA’s Chris Simkins has more on the story.