Russians had considered their country immune to the kind of school violence that the U.S. has suffered in incidents such as the Sandy Hook Elementary shootings and the Columbine High School massacre. Now, 15-year-old Sergei Gordeyev has disabused them of that notion, killing a teacher and a cop at his school in northern Moscow. News of the shooting, which occurred around midday Monday, immediately prompted comparisons to the U.S. "Have we caught the American disease?"... (GunPolicy.org)