flyingsquid writes: Wednesday morning, Iranian scientist Mostafa Ahmadi Roshan was killed during his morning commute, after an attacker on a motorcycle placed a magnetic sticky bomb on his car, reports the New York Times http://www.nytimes.com/2012/01/12/world/middleeast/iran-reports-killing-of-nuclear-scientist.html?ref=world&cid=nlc-dailybrief-daily_news_brief-link4-20120111. Roshan, a supervisor at the Natanz uranium enrichment site, is the fourth Iranian nuclear scientist to be killed in two years. The assassinations appear to be part of a covert effort to disrupt the Iranian nuclear program, which has involved an attack using the Stuxnet computer worm, and the use of American spy drones over Iran. Iran's nuclear program and missile program have also been plagued by suspicious accidents. The U.S. has condemned the assassination, but an Israeli spokesman said he was "definitely not shedding a tear." Bombing enemy weapons facilities is one thing, but what about targeting scientists? Is assassination unethical, or does developing weapons of mass destruction make you a legitimate target?