(Portland, OR) -- The Cottonwood School of Civics and Science has moved to a new building just weeks before the school year starts due to safety concerns tied to protests outside Portland's ICE facility. School leaders say chemical agents and munitions from demonstrations reached the campus playground and garden over the summer, leading families to pull students and forcing the board to relocate. Enrollment dropped from more than 200 to about 157 amid the unrest. The K-8 charter school will now open September 2 at its new site on Southwest First Avenue.