Tuesday, Pope Benedict heads to Turkey, and security in the mostly Muslim country is on high alert.

That is because of a speech the Pope gave in September about Islam. He quoted a medieval scholar who said among other things, that the prophet Mohammed spread his faith at the point of a sword.

That sparked worldwide outrage from many Muslims, and months later, that outrage has not completely died down.

"There is right now an element within the Muslim world that wants to be outraged because it wants to act on that outrage and mobilize its supporters," analyst Fareed Zakaria says. "But for the vast majority of Muslims, my sense is that the Pope is not a figure of hostility."

The Pope hopes Tuesday's trip to Istanbul will mend fences and calm tensions between Muslims and Christians.