Authors : Malaysia Airlines Flight 17 disaster may be sign of more instability and danger ahead . ( CNN ) -- They say nonstate groups can get access to lethal weaponry and inflict serious damage . Rules of deterrence that inhibit state leaders from risky behavior may not apply , they say . Comment: It may be harder to trace incidents of terror and violence back to their source .
Authors : Malaysia Airlines Flight 17 disaster may be sign of more instability and danger ahead . They say nonstate groups can get access to lethal weaponry and inflict serious damage . Rules of deterrence that inhibit state leaders from risky behavior may not apply , they say . Comment: It may be harder to trace incidents of terror and violence back to their source .