Written by STERLING GATES & GREG RUCKA Art by JAMAL IGLE & others Cover by JOSHUA MIDDLETON Supergirl and Flamebird must work together to track down their father's assassin - Reactron! But these childhood friends find themselves at each other's throats in these stories from SUPERGIRL #43 and 45-47, ACTION COMICS #881-882 and SUPERMAN SECRET FILES 2009 #1.