#CNNWorld

There are just over 15,000 nuclear weapons in the world and several ways countries can deploy them. Jim Sciutto explains the potentially catastrophic effect nuclear weapons can have and what technologies exist to defend against them.

The US Air Force is expected to start flying its "radiation sniffer" jet off the Korean Peninsula in the coming hours to take air samples to see if it can determine a nuclear event occurred in North Korea on Friday morning.

FIFA's former president Sepp Blatter faces an investigation into multiple allegations including bribery and corruption, the football governing body's ethics committee announced Friday.

An earthquake reported in North Korea is believed to be artificial, the South Korea Meteorological Administration said.

A dramatic rescue operation is underway for dozens of passengers trapped in cable cars high above the French Alps, authorities said.

According to new figures, more than 101 million passengers traveled through the world's busiest airport in 2015.

Elon Musk is still trying to pinpoint the source of a huge chain of explosions that destroyed SpaceX's Falcon 9 rocket last week at Cape Canaveral.

You can now play Pokemon Go without having to stare at your phone screen. Yay, right?

North Korea's latest nuclear test will pile the pressure on China -- the country's economic benefactor and only real ally -- to rein in Kim Jong Un's regime.

Hajj -- an annual pilgrimage of people, united in spite of sectarian beliefs, regional divisions and rivalries. But this year that chorus will be diminished, writes Nima Elbagir.

They say walk before you can run, but chances are, this kid will probably just fly.

'Tis the Hajj season again. Once a year, millions of pilgrims dressed in white descend on Islam's holiest site: Mecca in Saudi Arabia.

NASA is launching a space probe called OSIRIS-REx on Thursday to chase down a dark, potentially dangerous asteroid called Bennu. The probe will take a sample of the asteroid and -- in a US space first -- bring the sample back to Earth.

A few days after an American and Australian were kidnapped from American University in Kabul last month, US Special Operations Forces from SEAL Team 6 attempted to rescue them but failed to find them at the location they went to, according to three administration officials.

Turkey has suspended thousands of teachers over alleged links to a militant Kurdish group, according to sources and state-run news agency Anadolu.

Once-secret Soviet documents claim Palestinian President Mahmoud Abbas was once a KGB agent codenamed "Mole."

Ahead of renewed peace talks between US Secretary of State John Kerry and Russian Foreign Minister Sergey Lavrov there is a sense of foreboding.

The pictures from Brazil are heartbreaking: baby after baby born with a small head and damaged brain after an attack by the Zika virus during pregnancy. The official numbers are equally disturbing: The rate of birth defects involving the nervous system nearly doubled across Brazil after Zika arrived.