When Moammar Gadhafi renounced chemical weapons in 2003, the Libyan dictator surprised skeptics by moving quickly to eliminate his country’s toxic arsenal. He signed international treaties, built a disposal facility and allowed inspectors to oversee the destruction of tons of mustard gas. But Gadhafi’s ...

Last month’s alleged chemical attack near Damascus has refocused attention on Syria’s 30-year-old biological weapons research and raised concerns about whether its regime could activate an effort to make a weapon. Syria’s bio-weapon program, which U.S. officials believe has been largely dormant since the ...

After the guns of World War I fell silent, the world’s nations convened in Geneva to outlaw for the first time an entire class of weapons. Barely 1 percent of the war’s battlefield deaths had come from toxic chemicals, yet these had evoked greater ...

Iran’s economy is showing signs of foundering just as the country prepares to inaugurate its first new president in eight years, with Western sanctions cutting ever deeper into the Islamic republic’s financial lifelines and increasing pressure for a nuclear deal with the West. New ...

In late 2005, as Iraqi roadside bombings were nearing an all-time peak, the National Security Agency’s newly appointed chief began pitching a radical plan for halting the attacks that then were killing or wounding a dozen Americans a day. At the time, more than ...

Syrian tanks were closing in on the rebel-held town of Qusair last month when a Kuwaiti sheik named Hajjaj al-Ajmi and his money machine roared into action. In a series of urgent messages on his Twitter account, al-Ajmi appealed for cash to help save ...

The bombs that tore through a crowd of spectators at the Boston Marathon could have cost as little as $100 to build and were made of the most ordinary ingredients — so ordinary, in fact, that investigators could face a gargantuan challenge in attempting ...