Shocking video captured the moment a serial offender pulled out a massive knife and stabbed a passing tourist near Times Square in a horrifying unprovoked attack. Video of Saturday evening’s attack shows the man using a walker to exit Port Gourmet Deli at West 43rd and Eighth Avenue and loitering outside the storefront before lunging at an unsuspecting woman on the sidewalk. The attacker can be seen in the clip wearing a bright yellow sweatshirt under a dark jacket and an orange hat leaving a store and sitting outside on his walker. Two women can be seen walking toward him...