words, arebama's elected to have any effect? >> the issue behind all this is the shooting of a number of egyptian police back in august. i think that set off a chain of events, which has led to various protests, various riots, including this one today. there is a lot of feeling, even amongst police, that israel has overstepped the mark, it has gone beyond what it should be able to do. it has resulted in the deaths of egyptian officials. it is difficult to see exactly how it is going to end up, but i think the u.s. authorities are aware that the middle east is finally -- it is free difficult for them to see how this could possibly move on. >> there has been violence in cairo. the egyptian protesters have broken into the israeli embassy building in cairo after using hammers to demolish a barrier wall. police have fired tear gas and some vehicles were on fire. the government has called a state of alert and has called an emergency cabinet meeting. barack obama urged -- to protect the embassy after israel ask for help. the violence i