![Passengers queue at Portuguese airline TAP's customer service desk during a strike at Lisbon's airport October 30, 2014. Air traffic was disrupted Thursday in Portugal, due to a 24-hour strike observed by Passengers queue at Portuguese airline TAP's customer service desk during a strike at Lisbon's airport October 30, 2014. Air traffic was disrupted Thursday in Portugal, due to a 24-hour strike observed by](https://c8.alamy.com/zooms/6/88d6e1631ea745e9a03607b57945d9a4/2cyme97.jpg)
Passengers queue at Portuguese airline TAP's customer service desk during a strike at Lisbon's airport October 30, 2014. Air traffic was disrupted Thursday in Portugal, due to a 24-hour strike observed by
![Passengers queue at Portuguese airline TAP's check-in desk during a strike at Lisbon's airport May 1, 2015. Portugal's government urged pilots at flag carrier TAP on Thursday to call off a 10-day Passengers queue at Portuguese airline TAP's check-in desk during a strike at Lisbon's airport May 1, 2015. Portugal's government urged pilots at flag carrier TAP on Thursday to call off a 10-day](https://l450v.alamy.com/450v/2cyj9hr/passengers-queue-at-portuguese-airline-taps-customer-service-desk-during-a-strike-at-lisbons-airport-may-1-2015-portugals-government-urged-pilots-at-flag-carrier-tap-on-thursday-to-call-off-a-10-day-strike-it-says-would-damage-tourism-and-could-ruin-the-airline-scuppering-a-privatisation-process-due-to-start-next-month-reutershugo-correia-2cyj9hr.jpg)
Passengers queue at Portuguese airline TAP's check-in desk during a strike at Lisbon's airport May 1, 2015. Portugal's government urged pilots at flag carrier TAP on Thursday to call off a 10-day
![Passengers queue at Portuguese airline TAP's customer service desk during a strike at Lisbon's airport October 30, 2014. Air traffic was disrupted Thursday in Portugal, due to a 24-hour strike observed by Passengers queue at Portuguese airline TAP's customer service desk during a strike at Lisbon's airport October 30, 2014. Air traffic was disrupted Thursday in Portugal, due to a 24-hour strike observed by](https://c8.alamy.com/comp/2CYME97/passengers-queue-at-portuguese-airline-taps-customer-service-desk-during-a-strike-at-lisbons-airport-october-30-2014-air-traffic-was-disrupted-thursday-in-portugal-due-to-a-24-hour-strike-observed-by-the-crew-of-the-national-airline-tap-reutershugo-correia-portugal-tags-transport-business-employment-civil-unrest-2CYME97.jpg)