Many Americans believe that the threat of homegrown terrorism is gravest in Europe, but according to the U.S. government, in the last 18 months more than a half-dozen plots were thwarted right here at home. Sen. Joe Lieberman says the threat is growing. “Bottom line: There is a threat of homegrown terror in America,” he said. “It is not as great as in European cities, but it is growing and we have to take it seriously.” Full Story