ENAV airport personnel to strike for 4 hours, from 12:30 to 16:30 on Saturday, May 3rd. Please check with your ticket office whether this will affect your flight.
Note: the fact that a number of workers are on strike does not mean that you are necessarily grounded. Call the reservation office where you bought the tickets to obtain detailed information. Often only workers from a specific labor union within a company will go on strike, and thus you might not be affected at all.
http://www.summerinitaly.com/planning/strike.asp