Gaza is about half the size and population of Toronto, but with two crucial differences. Of the approximately 1.4 million people living in Gaza, 50 per cent are children. And it is often said that Gaza is a giant prison. Gaza is surrounded by walls and high-tech surveillance. Virtually no one is permitted to leave without Israeli permission. When Israel began its "Operation Cast Lead" on Dec. 27, Gazans had nowhere to run and nowhere to hide.