The outgoing first sergeant of Headquarters and Headquarters Company for the Aviation and Missile Command, 1st Sgt. Erika Vargas, right, prepares to pass the guidon with the unit’s colors to HHC Commander Capt. Jeremy Myles, center. Incoming HHC 1st Sgt. Michael Mills, left, stands ready to receive the guidon on accepting his new role as senior NCO of the unit during a change of responsibility ceremony March 27.