In the past few days, some young teenagers have been arrested for some alarming crimes. Yesterday afternoon, a 13-year-old girl allegedly set fire to some papers in a classroom, causing a fire that injured six people. And a few days before that, a 13-year-old and a 15-year-old were arrested for killing an 18-year-old! The fire at Brooklyn's I.S. 228 was called in around 5:30PM. Investigators say the girl had been "playing with a cigarette lighter"......