The Advance reported that while terrorist attacks on Staten Island's bridges would be difficult, experts say, the Staten Island Ferry remains a high-profile, vulnerable target. Harvey Kushner, a Long Island University professor of criminal justice and a federal government counterterrorism adviser, said the payoff for terrorists would be the sea disaster spectacle value. Officials said city ferries remain vulnerable despite the post-9/11 ban on trucks and cars. Instead of using car or truck bombs to attack the ferries, terrorists simply could send suicide bombers aboard the boats posing as passengers, it was explained. Police and Coast Guard officials have beefed up security on the ferries since 9/11. The NYPD assigned additional officers to patrol the boats and the ferry terminals.