Satellite photos of crowds trying to flee Gaza shows the unimaginable scale of the crisis

• Crowds of Palestinians trying to flee southern Gaza can be seen from space.
• Israel ordered parts of the southern territory to evacuate on Thursday.
• Since launching a ground invasion in the north, Israel may be gearing up to head south. 

A massive crowd of Palestinians huddled together as they try to flee southern Gaza can be seen from space, satellite images show.