Berta Caceres was a Lenca Indian activist well-known in her country, shot in her home. She was not only known in Honduras, she was one of the world's best-known environmentalists and had recently opposed plans for a dam on a river considered sacred by the Lenca. Honduran police have said they are investigating the murder as a botched robbery, but many of her colleagues believe Caceres was targeted.

We're really talking about the Army and Marine Corps here for almost all these ground combat jobs. They want to move in a careful, deliberate manner.

Marine and Army women have deployed with infantry units in Iraq and Afghanistan in what's called female engagement teams, going into villages, talking with women and sometimes coming under fire.

Berta Caceres was a Lenca Indian activist well-known in her country, shot in her home. She was not only known in Honduras, she was one of the world's best-known environmentalists and had recently opposed plans for a dam on a river considered sacred by the Lenca. Honduran police have said they are investigating the murder as a botched robbery, but many of her colleagues believe Caceres was targeted.

Women and men will have to go through the same physical test before they get into these ground combat jobs, and the test will increase over time for again both Marine Corps and the Army just to make sure everyone is physically fit enough to go through these jobs, to get through this training.

Honduras has one of the highest murder rates in the world. The drug trade is responsible for much of that.

The Marines estimate that roughly a hundred or 200 women will be interested in going into these jobs - roughly 2 percent of those jobs. Still, this is historic. It's a biggest cultural change in the military maybe ever, probably bigger than integrating the force back in 1948 when African-Americans were no longer segregated in separate units.