Well perhaps had their afghani parents not taken them there....here I will help flesh put this story for you, as all of the sudden people care about California....and the nut jobs out there...
"The students, whose grades range from elementary to high school, are from 19 families from the San Juan Unified School District in Sacramento. Most of the students, the school district says, have family members with them. The Sacramento area is home to one of the United States' largest Afghan American communities".
So, there you go, there is the whole story.
