A massive explosion, apparently from a vehicle, rocked the Bronx borough of New York City Wednesday evening, injuring at least seven firefighters and sending several to the hospital, some with severe burns. The cause of the blast is still being investigated. The size of the blowup certainly raises questions. The explosion occurs at the seven-second mark of this video: 🚨#BREAKING: A Vehicle has caused a large explosion injuring multiple firefighters 📌#Bronx | #NewYork At this time Emergenc...