How could a ground invasion in Gaza unfold?

Many countries in the Middle East have urged Israel to hold off on plans for an all-out assault on northern Gaza. With roads turned to rubble by air strikes and fuel running out, the UN says it’s impossible to evacuate such a huge number of people in such a short space of time. And for people who are seriously ill or injured it amounts to a death sentence.

Paul McNamara looks at what such a massive evacuation means in a place like Gaza, and how a ground invasion might unfold.