As a woman photojournalist who has been beaten and shot at, fended off attempted rape, and -- back in the USA -- suffered the discriminatory insults of an editor after having crossed a sniper's alley 6 times on a foreign story for him, I highly recommend this NYT piece by Kim Barker called Why We Need Women in War Zones.
Breaking the silence is key, and so is having workplace codes for staffers and freelancers, which will prevent us from losing work after reporting to our superiors what abuse we may have suffered.
http://www.nytimes.com/2011/02/20/opinion/20barker.html?_r=2&ref=opinion