"There could be a strike during Easter Week and there could be an indefinite strike every Monday and Friday, " Manuel Atienza, of the General Workers Union (UGT), told CNN on Monday.
But Manuel Atienza, of the General Workers Union (UGT) said the strike will have more impact as it continues, because overloaded ground crews, even while complying with legally-mandated minimum services, will fall farther behind on tasks like baggage handling.