Joby Warrick

Six years after the Trump administration withdrew from the Iran nuclear accord, Tehran is rapidly accumulating enriched uranium, some of it very close to weapons-grade.

Before Friday’s massacre, ISIS spinoffs were on the march from North Africa to South Asia. One group appears laser-focused on terrorist attacks abroad.

Trump has long railed against European freeloaders, but the claim at a weekend campaign rally in South Carolina was provocative even by his standards.

The Gaza conflict has re-energized old fundraising networks with ties to militant Islamist groups and causes, including groups accused of raising money in the past for al-Qaeda, current and former U.S. counterterrorism officials say.

Momentum is building to hold Syrian officials accountable for the alleged use of sarin and other deadly chemicals against civilians.

Hamas is known to have acquired underwater drones and other novel weapons with Iran’s technology. It hasn’t used them – yet.

Iran is ‘broadly complicit’ in supporting Palestinian militants, but no evidence seen of a direct role in slaughter, officials say.

The previous incident raises questions over whether law-enforcement officials were aware of warning signs that might have led to a block on the suspect acquiring weapons.

On Sept. 12, 2001, the United States staggered to its feet amid the devastation of the al-Qaeda terrorist attacks. Yet, for some Americans and millions of others around the globe, the harshest impacts were just beginning.

Six months into the outbreak, the disease is now seen as an “adverse-force multiplier,” raising the risk of violence globally.

Investigators accused Damascus of deception and set a 90-day deadline for revealing how much deadly sarin it hid.

Despite deepening financial troubles, Iran’s elite military unit projects itself as the country’s savior.

The new intercontinental weapon’s propulsion system looks to some like a Soviet knockoff.

The White House is stymied on a plan to add the Saudi ISIS branch to a terrorist list.

A bipartisan panel said community engagement and earlier intervention could help stop lone-wolf attacks.

Bombings of tankers, attacks on wells and actions against financial networks bleed the militants’ resources.

Video all but rules out the possibility of an accident in the Nov. 4 incident, but a motive is unclear.

Homeland defenses have hardened, but U.S. efforts to blunt radicalization have achieved little.

Imam was a holdover from the Islamic State’s earlier iteration of al-Qaeda in Iraq and served under Abu Musab al-Zarqawi before joining the Islamic State.

European perpetrators were often violent men before they became terrorist foot soldiers.