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LISBON, PORTUGAL - JUNE 16: Trucks loaded with containers are parked in the harbor area during stevedores strike after port operators and dockers failed to agree terms for a new collective contract, within a 15-day deadline agreed between the two parties last May, on June 16, 2016 in Lisbon, Portugal. Operations at the Portuguese ports have been hit by industrial action staged by the Portuguese Dockers Union (SETC) pushing for better working conditions. (Photo by Horacio Villalobos#476916#51B ED/Corbis via Getty Images)

LISBON, PORTUGAL - JUNE 16: Trucks loaded with containers are parked in the harbor area during stevedores strike after port operators and dockers failed to agree terms for a new collective contract, within a 15-day deadline agreed between the two parties last May, on June 16, 2016 in Lisbon, Portugal. Operations at the Portuguese ports have been hit by industrial action staged by the Portuguese Dockers Union (SETC) pushing  for better working conditions. (Photo by Horacio Villalobos#476916#51B ED/Corbis via Getty Images)