20 years later, visitors pay respects at Columbine memorial

LITTLETON, Colo. (AP) — Community members in suburban Denver marked the 20th anniversary of the Columbine High School shooting Saturday by volunteering at shelters, doing neighborhood cleanup projects and laying flowers and cards at a memorial to the 13 people killed.A remembrance ceremony was planned for later in the day. The events end a three-day slate of somber gatherings honoring the victims and lending support to their families, survivors of the April 20, 1999, attack and the school'