Twenty-two people were hospitalized and many others injured when a homemade bomb exploded on a crowded London subway carriage during the busy morning commute Friday, in an incident authorities are treating as an act of terrorism.Commuters on the District line reported a loud explosion that sent a fireball roaring down the carriage as their train entered Parsons Green station in west London at about 8:20 AM local time. The blast triggered a stampede of terrified passengers, sending some running along the train tracks, according to reports.Continue reading on VICE News.