. >> this is a terrible story. 18-year-old connor golding is recovering tuesday here at bellevue hospital in manhattan eastside. the university of miami student that was severed in what investigators are calling a freak accident. that happened in central park, he was climbing a rock just off the path when an explosion mutilated his foot. is is a music major from fairfax, virginia was with two friends who travel to the city to celebrate the fourth. saturday they set out to have an adventure in the park and the bazaar blast happened just before 11:00 a.m. emergency responders rush to the scene taken golden here, where he had to have his left leg amputated below the knee. the lieutenant mark torre, the commanding officer of nypd bomb squad said the college student stepped on a shock set sensitive explosive device. they believe it was a homemade firework left in a plastic bag and it was discarded after a failed attempt set it off on friday. please say this rudimentary device created an isolated incident with no linked threat to nyc. they're looking at the device and investigation and will get

. >> 18-year-old connor gold i don't know was serious live injured after stepping on an explosive. police believe the device may have been there for some time and have ruled out any ties to terror. law enforcement is also monitoring radical islamic and terroristic threats as ramadan ends tuesday. the empire state building will be lit up red, white and blue, a symbol of patriotism amid hopes for peace. the department of home land security urges any of you headed to larger events to be vigilant and aware of your surroundings as you have a happy fourth of july. >> a vigil is planned for a u.c. berkeley student killed in a terror attack in bangladesh. 20 hostages died. the government is blaming a local militant group. authorities are questioning several of the survivors, including one seen on surveillance video talking to an attacker. >> a missionary from south of fresno lived two blocks away from the cafe. the man did not want to be identified. he said his son was friends with one of the victims. >> he was granted freedom by the terrorist but would not take it because he wanted to pro

those machines are also mixed with low tech like strength training with gold medalist swimmer connors and core strength. >> my form looks nothing like your form. proper training also means recovery like soaking sore bodies in hot and cold plunges. and using sports medicine in preventing injuries. >> the real goal is to prevent them from occurring. so if we can take care of some of the soft tissue things before they become a significant issue that impacts their ability to compete is a benefit for athletes and team usa. >> which can mean an ultrasound to check conditions of muscles and tendons. >> you have a perfect looking tendon. >> ye i almost feel like an olympian so it's time for me to compete like one in the pool. >> we got you a cap. >> be part of team usa. >> olympians sometime use a tow line as part of their training to keep them at a certain pace. helped me set a personal best with a little help. >> natalie is still there and training for rio. >> can i say something -- >> odds on favorite for bronze in swimming. >> i did a triathlon for natalie. she finished, got eggs and bac

reporter: those machines are also mixed with the low tech, like strength training with gold medallist swimmer connoroor strength. >> reporter: my form looks nothing like your form. >> reporter: proper training also means recovery. like soaking sore bodies in hot and cold plunges. >> we keep that about 51 degrees. >> reporter: that is cold. and using sports medicine in preventing injuries. >> our real goal is to prevent them from occurring. if we can take care of some of the soft tissue things before they become a significant factor, that's definitely a plus for the athlete and for team usa. >> reporter: hey doc. which can mean an ultrasound to check muscles and tendons. >> and you have a perfect looking tendon. >> reporter: i almost feel like an olympian. so it's time for me to compete like one in the pool. >> you look the part. we got you a cap. >> reporter: look at that. >> team usa. >> reporter: olympian sometimes use a towline as part of their training. to take them along at a certain pace. helps me set a personal best with a little help. >> natalie's still there and she's training for rio. >> e