Spanish air traffic controllers to strike for four days in June
They will strike on June 8, 10, 12 and 14 for two hours each morning and two hours each afternoon in industrial action across the country.The workers are to strike over a dispute on penalties given by airport operator AENA to controllers for a 2010 strike.
http://www.itv.com/news/update/2015-05-27/spanish-air-controllers-to-strike-for-four-days-in-june/