i'm rachel hodges. still to come, as america prepares to remember 9/11, security is stepped up to counter a possible new terror threat. and the u.n.'s world food program delivers a new warning about food shortages in north korea. a state of alert has been declared in egypt after hundreds of protesters broke into the israeli embassy building in cairo using hammers and iron bars to demolish a barrier wall outside. you can see these latest shots live from there now. a group of activists has broken away from a larger demonstration in nearby tahrir square earlier. israel's ambassador to egypt is reported to be at cairo airport waiting to leave the country. a bbc journalist joins me on the line now from cairo. how close are you to these scenes that we're seeing here? >> instead of the -- i am right now in front of hundreds of egyptian protesters. they are protesting and they are trying to invade. i have seen tear gas. they try to separate them. they succeeded to destroy in the front of the embassy. >> the pro