Three people, including a seven-year-old boy, were killed Saturday evening in a head-on collision on Highway 14 three miles west of North Bonneville.  According to the Washington State Patrol, an eastbound pickup driven by 24-year-old Heath Martin of North Bonneville drifted over the center line and struck an on-coming van driven by Anatoliy Goy of Kent.  Both drivers were pronounced dead at the scene, as was a young child in the van.  Three others in the van:  49-year-old Mariya Goy, an 11-year-old boy and a seven-year-old boy, were transported to Legacy Emanuel Hospital in Portland.  It is not known if alcohol or drugs were a factor in the accident.  The accident occurred just after 8 p.m. Saturday, in front of the Skamania County Fire District #5 station.