EAST LANSING, Mich. (AP) _ Michigan State University’s campus is hosting 15,000 Boy Scouts and adult leaders as part of the 100th anniversary conference for the group’s national honor society.

The Lansing State Journal (http://on.lsj.com/1MLQavJ ) reports the conference for the National Order of the Arrow runs through Saturday in East Lansing. Scouts and adult leaders are taking part in training, ceremonies and activities such as rock climbing and obstacles courses.

Order of the Arrow spokesman Scott Scheffler says Scouts who become members must be seen as leaders and achieve the first-class rank. He says Scouts at this year’s conference come from all 50 states and several countries.

The Scouts will take part in a service project Friday to help Michigan State test emergency drills and warning systems.