Médecins Sans Frontières (MSF) has been among the highest risk-taking NGOs since it was founded in 1971, with its staff routinely putting their lives on the line in the midst of hostilities. In 1995, MSF ran the only hospital in Srebrenica, only being forced to withdraw once the Bosnian Serb Army entered the enclave.Yet sometimes they have to withdraw - either to protect their independence or security.