Members of the Waltham High School Music Unlimited group perform during the All Choir Concert at Waltham High School on Wednesday, Mar. 11, 2015. (Wicked Local Staff Photo / Brett Crawford)

Members of the Waltham High School Music Unlimited group perform during the All Choir Concert at Waltham High School on Wednesday, Mar. 11, 2015. (Wicked Local Staff Photo / Brett Crawford)

Brett Crawford