It's clear that security concerns are a big deal around the city. I noticed that all of the big hotels--especially the American names (Hilton, Hyatt, Sheraton)--have vehicle checkpoints and even metal detectors to clear before one gets into the building. Police armed with rifles or machine guns are on many street corners, as well. Egypt is a moderate Arab state with historically close ties to the U.S. and has enjoyed a peaceful relationship with Israel since 1977--all factors that could potentially fuel the flames of Islamic radicals in this country. Since tourism is so integral to the economy of Egypt, one can understand why such a huge investment has been made in securing the city and all of the tourist sites throughout the country, especially after a bloody terrorist machine gun attack on tourists about a decade ago.