over the summer leaving 86 dead, sand trucks and other vehicles will be used to block off new york streets. while in chicago, fences and concrete barricades went up amid concerns about isis-inspired attacks. boston is taking similar steps. it s sad we have to do this type of stuff, but it s a reality of what s happening now in the world. reporter: in pasadena, california, home to the rose parade, law enforcement outlined their new strategy. we ll be using a series of police radio cars staffed with either uniformed officers or deputies and water barriers to create a brigade of sorts. reporter: overseas, in germany officers in some cities are now armed with machine guns. in london police presence is ramped up around buckingham palace and the markets. yeah, i think it s quite safe. reporter: and in times square today, support for the police. i think they ve been doing a great job anyway and just enjoy
this type of stuff, but it s the reality of what s happening now in the world. reporter: in pasadena, california, home to the rose parade, law enforcement outlined their new strategy. we ll be using a series of police radio cars, staffed with either uniformed officers or deputies, and water barriers create a chicane of sorts. reporter: overseas, security is being increased across europe. in some cities, officers are now armed with machine guns. in london, police presence is ramped up around buckingham palace and around the markets. yeah, i think it s quite safe. reporter: in times square today, support for the police. i think they ve been doing a great job anyway and just enjoy it like we re enjoying it. reporter: part of law enforcement s strategy, a big show of force to create a deterrence and instill confidence in everyone loong tocelebrate. that was stephanie gosk reporting for us. coming up, as relations grow chilly between the u.s. a russia, if pr battle is play