EasyJet Chief Executive Officer Carolyn McCall speaks at a joint news conference with International Airlines Group Chief Executive Officer Willie Walsh, Air France-KLM Chief Executive Officer Alexandre de Juniac, Lufthansa Chief Executive Officer Carsten Spohr and Ryanair Chief Executive Officer Michael O’Leary in Diegem, near Brussels international airport, Belgium, June 17, 2015. REUTERS/Francois Lenoir