The opening ceremony at the winter Olympics in Sochi, Russia gets under way Friday, and in the run up to the games, there's been a huge international concern over security. If there is an attack at the Olympics that kills or injures Americans, the U.S. will activate an extensive response plan.
"If something does happen, you are going to see the information systems of the United States government light up," said Peter Brookes with the Heritage Foundation.
It begins in Sochi at a U.S. operations center where dozens of security personnel are on the ground. Agents will accompany American athletes to every venue.
But if terrorists strike: they will shift gears. FBI agents will gather information and evidence, intelligence personnel will try to find out what the Russians know.
In any aftermath, communications from Sochi to the U.S. Embassy in Moscow will be around-the-clock. U.S. diplomats will talk to Russian counterparts, making arrangements to help any Americans who need it, but the U.S. will have to defer to Moscow.
"This is Russia's show, this is Russia's sovereign territory and international coordination is going to be critical if there is a disaster or an attack on the ground," said Brookes.
The Pentagon emphasizes it would only move in if Russia asked for help.
"We want them to know that, if they need our help, we want to help," said Defense Secretary Chuck Hagel.
The major military job would be to evacuate American citizens if there is no commercial aviation.
"If we need to extract our, our citizens, we will have appropriate arrangements with the Russians to do that," said Hagel.
The U.S. European command in Stuttgart, Germany now has direct communication with Russian military commanders in the Sochi region.
The two warships, Mt Whitney and Taylor now in the Black Sea off Sochi could use helicopters to quickly evacuate U.S. government VIPs and provide communications for other us assets.
In Ramstein, Germany, U.S. C-17 transport aircraft standby with medical teams that could be in the air six hours after getting orders.
On Thursday the U.S. issued a temporary ban on toothpaste tubes, liquids, gels, and aerosols in carry-on bags on flights to Russia after worries about possible explosives