A hydroelectric plant in Ethiopia. The country hopes to harness the waters of the Blue Nile to export hydropower and to irrigate crops. Dawit Nida hide caption

itoggle caption Dawit Nida

A new report says the biggest threat against the U.S. now comes in the form of homegrown terrorists. But in many ways, trying to catch homegrown terrorists is more complicated: The suspect could now be an MBA from Connecticut -- like Times Square attempted bomber Faisal Shahzad (above) -- or a college student from Minneapolis. AP/Orkut.com hide caption

itoggle caption AP/Orkut.com