homeland security spokesman issuee a statement, sayiig -- quote -- "we have no indication of any speciffc, credible threats or plott against the u.s. tieddto thh one year annnversary of bin laden's ddatt."the obama administration also justified for the first time its use of unmaaned drones overseas in the war on terror.in full in order to prevent terrorist attacks on the united states pnd to ssve american ives, the united states overnment terrorists, sometimes using remotely piloted aircraft. meanwhile, a milessone was the "one world trade center" tower -- which will replace 9-11.workers added theefirst column of tte one-hundredth floor monday -- makiig it the pallest building ii new york city.it tooo the distinction back from the empire state building.i'm rick vincenn reporting. 3a year fter the raid, debate continues on whhther photos showing bin laden's body should be made public.the administration has keep the photos classified... sayinn their graphhc naaure would only incite more viollnce orr be used for propaganda.on turred down a request for their release. it's been 3 years since a