Nassau County authorities are urging people to be extra vigilant over the next 10 days.
Bomb-sniffing dogs and state troopers are on hand. There are officers on horseback and motorcycle along the route and police helicopters are also keeping an eye on things from the sky.
There have been at least four incidents in which middle school students were followed or approached by strangers in Merrick and Bellmore, officials said.
Police in Nassau County have increased patrols and heightened security in Merrick, after an alarming number of stranger danger incidents.
Residents in the West Village say their neighborhood is being overrun with drug dealers and other young people looking for trouble.
There is an ambivalence among many New Yorkers in the wake of an Associated Press investigation showing that after 9/11, police began spying on Muslim and Arab neighborhoods, often based only on ethnicity. The competing impulses of civic welcome and civic safety are evident throughout the boroughs.
State troopers and emergency responders will be conducting drills throughout Bergen, Hudson, Essex, Passaic, Morris, Union and Middlesex counties until Friday.