I would agree in terms of countries which support and possibly harbor Hezbollah, Hamas, and al-Qaeda, although I haven't seen any such written policy in this regard yet. In actuality, those inclined to do so could ship the parts for an explosive device on a piece-meal basis. In addition to those countries mentioned, I would also add Yemen, the Philippines as well as Central Asia (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, and even China's Xinjiang province) to the list.
RW