From a Yahoo news article
President Obama made a highly anticipated visit to the Middle East earlier this week. Folks around the world listened closely to his speeches. In the end, a few words and phrases stood out, either because they were said or because they weren't even alluded to.
There were no fist bumps, but there were many interesting moments during Obama's speech in Cairo. The moment that got the most attention, in Search anyway, was Obama's use of "assalamu alaikum." Said the President: "I'm also proud to carry with me the goodwill of the American people, and a greeting of peace from Muslim communities in my country: Assalaamu alaykum." After the speech, searches soared on the greeting, its meaning, and translation. According to the Islamic Dictionary, it literally means: "Peace be upon you." It is a shortened form of a phrase that translates to "Peace be unto you and so may the mercy of Allah and His blessings."