Israeli facilities worldwide are on high alert against an attack from Iran, according to an internal security document. We predict that the threat on our sites around the world will increase on both our guarded sites and 'soft' sites," read a letter by the head of security for the Consul General for the Mid-Atlantic States, ABC News reported. Guarded sites are government facilities like embassies and consulates; "soft sites" are Jewish synagogues, schools and community centers. Police and intelligence officials in US and Canadian cities including New York, Los Angeles, Philadelphia, and Toronto have increased patrols at Israeli government locations and Jewish institutions. The United States and Israel, meanwhile, are publicly disagreeing over timing for a potential attack on Iran to prevent it from acquiring nuclear weapons. Iran's Supreme Leader says his country will assist any nation or group that "confronts" Israel, describing it as a "cancer." The remarks by Ayatollah Ali Khamenei came during a Friday prayer ceremony in Tehran broadcast on state television. Khamenei, who has final say on all state matters, says that Iran has helped the Lebanese militant group Hezbollah and the Palestinian Hamas in their fights against Israel, and will aid others who do so. He describes Israel as a "cancer" and says, "It will be cut." Israel and Iran consider each other arch-enemies. Khamenei said on Friday Iran would retaliate over Western-backed oil sanctions and any threat of attack ...