Alva Review-Courier -

EAST LANSING, Mich. (AP) — When the texts began coming in about a shooter at Michigan State University, training that many students started receiving as schoolchildren automatically kicked in.

They ran. They found a place to hide. They locked and barricaded the doors. They turned out the lights. Then they waited as a gunman who killed three students and wounded five more eluded police for about four hours.

They are part of a generation that has grown up with active shooter drills. Schools and districts across the U.S. implemented such training after a shooting at Sandy Hook Elementary School i...