(Gresham, OR)  --  A 15-year-old boy is facing charges after allegedly shooting another teenager in Gresham.  Police say the two teens were crossing the street at Southeast 162nd and Burnside last night when the 15-year-old opened fire on the 18-year-old.  The victim was rushed to a hospital with non-life-threatening injuries.  Police have arrested the 15-year-old.