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While Americans focus on the significant challenges at home, they must also not forget the growing national security challenges that our nation faces abroad. The world remains a dangerous place, populated with states and groups that hold-or could hold-America and its interests around the world at risk.

TerrorismThe attempted Christmas Day bombing of an airliner over Detroit and the recent Times Square plot in New York City remind us that the terrorist threat is not behind us. We are still squarely in the terrorists' cross-hairs.In fact, while foiled conspiracies are quickly forgotten, it is important to remember that there have been at least 10 attacks or thwarted plots in the United States just over the past year, headlined by the tragedy at Fort Hood last fall. While we are...