The White House says the bomb was never an "active threat".

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Despite fits and starts in the peace process, the insurgency in the Central African Republic remains an active and real threat to the government of President Francois Bozize.

CNN: STORY HIGHLIGHTS

They engage in active research on new threat actors, new methodologies, and new vulnerabilities exposed by the types of targets that are being selected by cyber criminals and state actors.

FORBES: In Cyber, Losers Ignore, Survivors React, and Winners Predict

Protecting the United States against the evolving EMP threat will require a mix of active defenses, passive defenses, and policy changes.

CENTERFORSECURITYPOLICY: Old threat with a new face

Mount Rainier is also an active volcano - although there has been no activity since the 1850s and geologists say there is no imminent threat of eruption.

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