Italian aid workers Marco Garatti (L) an

Italian aid workers Marco Garatti (L) and Matteo Dell'Aira (R) from the aid agency "Emergency" answer journalists' questions during a press conference on April 23, 2010 in Milan. Three Italian charity workers freed on April 18 more than a week after being arrested for allegedly plotting to kill an Afghan official said investigations had proved them innocent. Matteo Dell'Aria, Marco Garatti and Matteo Pagani work for the Milan-based medical charity Emergency and were arrested on April 10 near the charity's hospital in Lashkar Gah, capital of restive Helmand province. AFP PHOTO / STRINGER (Photo credit should read STRINGER/AFP via Getty Images)