One killed in 7-car crash on I-15

AMERICAN FORK — One person was killed in a chain-reaction series of crashes involving at least seven vehicles on I-15 Tuesday morning.About 7:50 a.m., two Utah Highway Patrol troopers had pulled over a vehicle on the right shoulder of northbound I-15 at Pleasant Grove Boulevard.That's when the already heavy traffic in that area started to slow down even more, UHP Sgt. Todd Royce said.Other drivers who were following too closely became distracted by the troopers and were involved in a serie