New York police officers block traffic from entering 56th Street at 6th Avenue along the Macy's Parade route, except for residential and business vehicles, a block from Trump Tower. More than 80 sanitation trucks filled with sand will be used along a 2 1/2 mile route of the Macy's Thanksgiving Day parade to create an imposing physical barrier to terror. The trucks have been used like this before - most recently to protect Trump Tower.