Ryan, a student at Quantico Middle/High School, solders a part on a blinking device he is building with the assistance of Dave McCarthy, an engineer from Marine Corps Systems Command, during the QMHS summer STEM academy. - Ryan, a student at Quantico Middle/High School, solders a part on a blinking device he is building with the assistance of Dave McCarthy, an engineer from Marine Corps Systems Command, during the QMHS summer STEM academy.