On May 20 , 2002 , ACES merged with major competitor Avianca and SAM to form Alianza Summa , a strategic alliance aimed at joining forces to counteract the adverse circumstances that faced the airline industry in Colombia and the world after the September 11 attacks . ACES ' operations were halted on August , 2003 , after the board 's decision to liquidate the airline . By November , 2003 , the Summa Alliance was dissolved and ACES ' routes taken over by Avianca
September 11 attacks
September 11 attacks
ACES Colombia