Canada's government forced Air Canada and its striking flight attendants back to work and into arbitration Saturday after a work stoppage stranded more than 100,000 travelers around the world.

Hurricane Erin exploded in strength to a Category 5 storm in the Caribbean before weakening on Saturday, the National Hurricane Center said.

While atomic bomb survivors warn the catastrophic risks, leaders of nuclear-armed states and self-proclaimed 'realists' argue that the deterrence of nuclear weapons is what keeps them from being deployed.

President Trump says he is talking with his Ukrainian counterpart and European leaders about the next steps to try to end Russia's war on Ukraine.