Not everybody asserts as confidently as the Pentagon that the U.S. military can defend the United States from the growing threat posed by North Korea’s intercontinental ballistic missile capability.

Pyongyang’s first test Tuesday of an ICBM with a potential to strike the state of Alaska has raised the question: How capable is the U.S. military of knocking down an incoming missile or barrage of missiles?

Briefing reporters Wednesday, Pentagon spokesman navy Capt. Jeff Davis said, “We do have confidence in our ability to defend against the limited threat, the nascent threat that is there.”