Arthur Lanigan O'Keefe is Ireland's European Pentathlete Champion. Arthur competed at the… Arthur Lanigan O'Keefe is Ireland's European Pentathlete Champion. Arthur competed at the London Olympics and is now preparing to represent Ireland at Rio Pentathlon involves fencing, cross country running, riding, shooting and swimming. As part of his crucial preparations Arthur was traveling to competition today until Aer Lingus embarrassingly removed him from his flight for having fencing…