Fort Greely, Alaska, a World War II-era Army base that was reopened in 2004, is America's last chance to shoot down a missile from overseas that could be carrying a nuclear weapon. Its underground steel and concrete silos house 26 missile interceptors that have, in tests, a 50 percent success rate.
The 800-acre base is located some 100 miles southeast of Fairbanks, in the looming shadow of Denali. It is one of only two missile defense complexes in the country. The other, Vandenberg Air Force Base in California, houses four interceptors that are used for testing and "backup," according to defense officials.
In March, as the North Korean crisis began to heat up, President Obama ordered another 14 interceptors be sent to Greely, bringing its arsenal to 44 from 2017.
Concern about North Korea heightened this week when the Defense Intelligence Agency released a document that concluded with "moderate confidence" that North Korea might have a nuclear weapon that's small enough to be placed on a ballistic missile. But the agency also said the reliability of a North Korean missile would be low.
