Some astronauts are on the international space station. They were scheduled to come down to Earth some time ago, but the rocket that's supposed to take them down has failures, and so the return trip has been postponed. NASA isn't convinced that the rocket can be fixed in time, and they have no alternatives ready, so for now the astronauts are just stuck in space.

Obligatory note that the rocket was built by Boeing, who are already in hot water for negligently lax construction protocols on their planes. As an extra note, Boeing engineers seem to think that NASA should use the rocket anyways because it's "unlikely" to crash and burn this time