Mohammed Merah, a French man of Algerian descent, shot and killed a rabbi, two of his children, and another child at a Jewish school.
He also wounded another teacher before killing himself. Brandon, shot and wounded two other Freshman students on the University campus.
Christopher Williams, 27, looking for his ex-girlfriend at Essex Elementary School, shot two teachers, killing one and wounding another. Brandon is being charged with attempted murder, assault, reckless engagement, as well as a gun charge.
The gunman kills 68 campers, including personal friends of Prime Minister Stoltenberg.
Police arrested Anders Behring Breivik, a 32-year-old Norwegian who had been been linked to an anti-Islamic group.
Merah said he was a member of Al Qaeda and that he was seeking revenge for the killing of Palestinian children.
One Goh, a 43-year-old former student at Oikos University, a Christian school populated by mostly Korean and Korean-Americans, opened fire on the campus, killing seven people and wounding several others.
At Discovery Middle School, a ninth-grader was shot by another student during a class change.
The boy, whose name was not released, pulled out a gun and shot Todd Brown in the head while walking the hallway. Two people were killed and two more injured in a shooting at Millard South High School.
At least 17 others are shot by a gunman, identified as Jared Lee Loughner, who opened fire on the congresswoman's constituent meeting outside a local grocery store. Three people were killed in a parking garage at San Jose State University.
Two former students were found dead on the fifth floor of the garage.
Four students and one teacher killed, ten others wounded outside as Westside Middle School emptied during a false fire alarm.