Debris from a Chinese rocket that's reportedly "out of control" is expected to crash into Earth in the coming days.
The Long March 5B was launched last week, carrying the main module of China's first permanent space station.
In response, the White House called for (quote) "responsible space behavior".
The Pentagon says the 21-ton main core will fall to Earth around Saturday, U.S. time, but warned the location cannot be pinpointed until hours before its reentry into the atmosphere.
However, experts say the debris will likely land in the ocean and poses very little threat to people.