The New York City police department is “very concerned” that al-Qaida is pursuing efforts to obtain chemical, biological or nuclear weapons, a senior official said Wednesday. Michael Sheehan, the NYPD’s counterterrorism commissioner, said officials know that Osama bin Laden’s terror network is searching for biological weaponry and it appears to have sympathizers with medical and scientific backgrounds who could handle them. “We are very concerned they are still trying to seek chemical, biological or radiological weapons,” he told reporters on the sidelines of an Interpol conference on bioterrorism in Lyon, southeastern France. “We don’t have any information that at this time they have that capability, but we do know they’re trying to get it,” Sheehan said of al-Qaida, declining to provide specifics. Full Story