The number of first responders to the September 11, 2001, terrorist attacks at the World Trade Center in New York City who have been diagnosed with cancer has reached 3,700. Those suffering from cancers certified by the federal government as 9/11-related include members of the New York Fire Department (1,100), police and other Ground Zero responders (2,134), and survivors such as downtown workers... 

Officials said the cause of the blast was a gas leak, though there was no evidence of that yet. NYC Mayor de Blasio confirmed that a gas leak triggered an explosion which destroyed two buildings in Upper Manhattan Wednesday morning at around 9:31 a.m. EST. Over half a dozen people have now been confirmed dead and over 74 injured. More than 250 members from the New York Fire Department (FDNY) have been...