US Attorney General warns US must prepare for terror attack

US Attorney General Eric Holder on Tuesday conveyed an urgent message for Americans on ABC News and said while he is confident that the United States will continue to thwart attacks, "the terrorists only have to be successful once."
"While it is not certain we will be hit, the American people have to be prepared for potentially bad news," Holder told the US news agency.
"What I am trying to do in this interview is to make people aware of the fact that the threat is real, the threat is different, the threat is constant," he went on to say.