The Sochi Games begin Feb. 6 on the shores of Black Sea. The city of Volgograd, formerly Stalingrad, in western Russia is still reeling from two suicide bombings.
Napolitano told NBC News' "Meet the Press" security "has always been an issue with the Games, probably going back at least to Munich. ... Do we have good liaison between the United States and the International Olympic Committee and with the host nation, and the like? And then just making sure that everyone who is attending the Games ... knows to be alert, attentive to their surroundings, that sort of thing.
She added, "I know the [U.S.] State Department through their security division and the FBI will have security people on the ground. And so I think we're going to have to rely on that. We look to cooperating with the IOC, with the host nation, and the other countries that are there in terms of protecting the security of the Games."
Napolitano also rejected amnesty for Edward Snowden, the former National Security Agency contractor and leaker now in Russia with temporary asylum. Napolitano told "Meet the Press," "Snowden has exacted quite a bit of damage and did it in a way that violated the law. I think he's committed crimes and I think that the damage we'll see now and we'll see it for years to come."
Napolitano is the leader of U.S. Presidential Delegation Winter Olympics Opening Ceremony, and president of the University of California system.
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