The intelligence unit of the four-month-old Department of Homeland Security is understaffed, unorganized and weak-willed in bureaucratic struggles with other government agencies, diminishing its role in pursuing terrorists, according to some members of Congress and independent national security experts. The vast majority of the department’s intelligence analysts lack computers that are able to receive data classified “top secret” and above. The department has only three experts on biological terrorism, a number that lawmakers said falls far short of expectations, given U.S. officials’ grave concern about that kind of attack. Full Story