Investigators will re-enact on Monday the flight of a Cypriot airliner which crashed north of Athens last August, killing all 121 people on board, Reuters reported yesterday. The re-enactment of the Helios Airways flight will be held in an attempt to shed some light on the worst airline tragedy ever in Greece and Cyprus. Authorities held a four-hour simulation of the flight in October at the training facilities of Olympic Airlines in Crete but said the re-enactment will help them verify findings. Seventeen people, pilots and engineers are expected to take part in Monday’s flight using an Olympic Airway’s Boeing 737-300. Authorities gave no additional details of the planned exercise.