LISBON, PORTUGAL - JULY 17: Luggage handling company GroundForce at Humberto Delgado airport is on strike for the weekend causing dozens of flights to be cancelled, in Lisbon, Portugal on July 17, 2021. Almost no flights were rescheduled due to lack of human resources in Lisbon, Portugal. Andre Alves / Anadolu Agency/ABACAPRESS.COM