A 16-hour hostage situation in Sydney that ended Monday in the deaths of the captor and two hostages underscored the danger of so-called "lone wolf" terrorist attacks, NBC News reported. Like the attack on Canadian Parliament and the hatchet attack of two New York City police officers earlier this year, the Sydney siege was carried out by one man inspired by radical Islam and acting on his own. "They have such a small signature and footprint," said the co-director of the Transnational Threats Project. "They can act whenever they deem fit."
