From The New York Times:
A former teacher at a charter high school and his twin brother were arrested on Thursday on federal bomb-making charges, stockpiling more than 32 pounds of ingredients for explosives in a closet in their apartment in the Bronx, law enforcement officials said.
The teacher paid high school students $50 an hour to break apart fireworks to extract the explosive powder, authorities said.
Investigators also found diary writings referring to an “Operation Flash” and a purple index card that read, “Under the full moon the small ones will know terror,” according to officials and a criminal complaint filed in Federal District Court in Manhattan.
The teacher, Christian Toro, and his brother, Tyler Toro, both 27, appeared in federal court in Manhattan Thursday afternoon and were ordered held in custody.