LONDON — More aid workers were killed worldwide by deliberate violence than accidents or illness in the past three years, according to researchers in the United States trying to measure if the humanitarian world is more dangerous than it used to be. A lot of aid workers say that in the climate following the September 11, 2001 attacks in the United States there's a higher risk of humanitarians being targeted for attack in some countries because they are perceived as... (GunPolicy.org)