near the gaza strip s southern border with egypt, trying to escape intense fighting elsewhere. the head of humanitarian affairs for the united nations says there is no longer any humanitarian operation worthy of that name in the south of gaza. meanwhile, aid agencies estimate nearly two million people have already been displaced that s almost 80% of gaza s population. thousands have tried to go to un schools to find shelter, but have had to sleep in front of buildings as there is no room for them. and most of those are struggling to find safe water and food, deepening the humanitarian crisis as israel s military operation against hamas grinds on. for more on the aid situation, here s our diplomatic correspondent paul adams in jerusalem. the israeli army is now fighting intense street battles with three parts of the gaza strip, two in the north, in the jabalia refugee camp and gaza city known as shejaiya. both areas the israelis have described as hamas strongholds. also in t