twelve o'clock
O'Malley 's voice broke in over Stan 's headset . `` Hey , sure an ' we ought to go down an ' bust that up . '' `` Stay where you are , O'Malley , '' Sim snapped . `` We have plenty of Me 's coming in at twelve o'clock . '' Stan had been so busy watching the bombers he had not checked his own part of the sky . A glance showed him Sim was correct . A flight of some twenty Me fighters were diving and circling above .