Authorities descended on a Staten Island home Thursday after learning of the presence of large amounts of potassium nitrate, authorities said. Police discovered more than a ton of the substance in a storage facility near the home. Small amounts of potassium nitrate, mercury, peroxide and sulfur were found inside the residence. The resident, a man in his 50s, was taken into custody and charges were pending. His name was not released. The substance is often used in pyrotechnics, but NYPD spokesman Paul Browne said Thursday there was no evidence the man was involved in making bombs or selling bomb-making materials....
