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International Space Station astronaut Alexander Gerst tweeted this picture from above Israel last night.
Describing it as his "saddest photo yet", the German said rockets were visible flying over Gaza and Israel.
More than 680 people have died in the Gaza Strip over the past fortnight, a quarter of them children, with 3,700 injured.
Thirty-two Israelis have been killed since the operation against Hamas begun, all but two of them soldiers.
More: Just where exactly are Gazans supposed to evacuate to?