Michael Greenberger, the founder and director of the University of Maryland's Center for Health and Homeland Security in Baltimore, said this isn't hype.
"We went through a phase sometime after Sept. 11 where people forgot about terrorism as a threat," he said.
Professor Greenberger will testify before the U.S. Senate Committee on the Judiciary, Subcommittee on Terrorism and Homeland Security at a hearing on "Strengthening Security and Oversight at Biological Research Laboratories."