But the effects required at least six years of regular use.

VOA: special.2009.09.01

Dramatic effects may be required for Thompson to give new life to a story that so far has proved nothing more than the need for campaign-finance reform.

CNN: Campaign Finance: The Show Begins

With thousands of warheads in the Russian arsenal and only a handful required to cause unprecedented destruction, it seemed impossible to develop the kind of near-perfect defenses required to mitigate the effects of a nuclear attack.

FORBES: Missile Defense Becomes A Navy Mission

The amendment required DoD to consider the effects of climate change upon their facilities, capabilities and missions.

FORBES: The New Military War Against Climate Change