A "large" satellite expected to crash to Earth sometime in late February or March

A "large" US spy satellite has gone out of control and is expected to crash to Earth sometime in late February or March, government sources say.

The satellite contains the rocket fuel hydrazine, a government official told AP on condition of anonymity.

A colourless liquid with an ammonia-like odour, the fuel is a toxic chemical and can cause harm to anyone who comes in contact with it.

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