Israel prime minister Benjamin Netanyahu is on his way to address a joint session of Congress.
"I am leaving for Washington on a fateful, even historic mission. I am the emissary of all Israelis, even those who disagree with me," Netanyahu says on Twitter today.
"I am deeply and genuinely concerned for the security of all Israelis, for the fate of the nation, and for the fate of our people.
"I will do my utmost to ensure our future."
Netanyahu will address AIPAC on Monday and Congress on Tuesday.