Geoff Brumfiel

Iran announced Monday that it will soon exceed a 300 kilogram limit on enriched uranium. It's the latest sign that a 2015 nuclear deal is unraveling.

The billionaire wants to deploy thousands of satellites in order to provide global Internet, but astronomers say they could create unsightly glare.

Iran has been developing drones for both itself and its proxies. In recent months those drones have been used for targeted assassinations, military strikes and to sow chaos in the region.

Iran has announced its intention to begin withdrawing from parts of a 2015 nuclear agreement in 60 days. The decision could reduce the time needed to develop a nuclear weapon — if Iran chose to do so.

Experts say the missile, tested on May 4 as part of a "strike drill," could be a new and destabilizing weapon on the Korean Peninsula.

Saudi Arabia is building a small civilian nuclear reactor, the nation's first. Nuclear power is an important part of its energy plans. Arms control experts ask if its intention is entirely peaceful.

The 60 or so members of the Jasons are normal academics by day. But each summer, they come together to study tough problems for the military, intelligence agencies and other parts of the government.

The president's 2020 budget plan calls for studying space-based energy weapons as a way to stop warheads. Critics say it didn't work with the "Star Wars" program in the 1980s and it won't work now.

The device was detonated as part of a mission to better understand the origins of planets.

New Delhi says it destroyed one of its own satellites in orbit, making India only the fourth country to test such a weapon.

A Spanish judge said the alleged attackers offered stolen hard drives and other materials to the FBI.

Multiple interceptors tracked and destroyed a missile carrying a dummy warhead. Advocates claim the test proves the system can provide some defense against countries such as North Korea.

A source says the president was referring to future penalties, not those imposed Thursday against two Chinese companies for illicit support of North Korea in violation of international sanctions.

New photographs from commercial satellites are showing activity at a variety of sites related to North Korea's space and missile programs. It could be a sign the North is preparing a launch.

Satellite imagery shows that vehicles and rail cars appeared in late February at Sanumdong, a facility where the North has built some of its largest rockets and missiles.

Satellite imagery suggests North Korea is preparing an intercontinental ballistic missile or satellite rocket launch at one of its test sites.

Just days after the U.S.-North Korea summit ended in stalemate, satellite images show workers have been active at the Sohae Satellite Launching Station, a partially disassembled missile test facility.

We look at what we learned after the second summit between President Trump and Kim Jong Un ended without a deal on denuclearization.

Days before President Trump and Kim Jong Un are to meet in Vietnam, satellite images show no river ice downstream from the key North Korean facility at Yongbyon — a sign the reactor may be running.

This month's summit between President Trump and North Korean leader Kim Jong Un is likely to focus on North Korea's main nuclear weapons center at Yongbyon.