2017 Lower Manhattan Attack

On October 31st, 2017, Sayfulla Saipov drove a rented pickup truck into cyclists and runners for 1 mile of the Hudson River's Park bike path in New York City. This attack killed 8 people and injured 11 others. After driving down the bike path, Saipov crashed into a school bus full of students with special needs and he exited the vehicle holding two guns (a paintball gun and a pellet gun). He was later shot in the stomach and was arrested. Saipov had ties with the terrorist group, ISIL. They found a flag and a document that related to this group, and also when he was in the hospital he asked if an ISIL flag could be hung over him while he stayed there. ISIL is a terrorist group that stands for the Islamic State of Iraq and the Levant and they are a jihadist militant group that is fighting in the Iraqi and Syria civil wars. What do you guys think the US should do to prevent further attacks like this?