to move more aggressively to limit '' the spread of biological weapons , the commission said in its report . Graham warned that such measures would be costly , but were necessary . `` The leadership of this country and the world will have to decide how much of a priority ... they place on avoiding the worst weapons in the world getting in the hands of the worst people in the world , '' he said . `` It is not going to be cheap . It is not going to be accomplished without some sacrifices . It wo n't be accomplished without putting this issue ahead of some other competing national and international goals . But I think our safety and security depend upon doing so , '' he added . Graham said a biological attack was more likely than a nuclear one because it would be easier to carry out . Biological weapons `` are more available , '' he said . `` Anthrax is a natural product of dead animals . Other serious pathogens are available in equally accessible forms . '' `` There are so many scientists who have the skills to convert a pathogen
WASHINGTON -LRB- CNN -RRB- -- Terrorists are likely to use a weapon of mass destruction somewhere in the world in the next five years , a blue-ribbon panel assembled by Congress has concluded . Police watch over travelers at New York 's Grand Central Terminal before Thanksgiving . They are more likely to use a biological weapon than a nuclear one -- and the results could be devastating , the chairman of the commission told CNN . `` The consequences of a biological attack are almost beyond comprehension . It would be 9/11 times 10 or a hundred in terms of the number of people who would be killed , '' former Sen. Bob Graham said . He cited the flu virus that killed millions of people in 1918 as an example . `` Today it is still in the laboratory , but if it should get out and into the hands of scientists who knew how to use it for a violent purpose , we could have multiple times the 40 million people who were killed 100 years ago , '' he said . Watch how officials worry about a biological terror attack '' The U.S. government `` needs