Members of the Italian aerobatic team Frecce Tricolori perform during the AirPower 13 air show at the Hinterstoisser air base in Zeltweg, Austria, June 28, 2013. Over 200,000 spectators are expected to attend the air show which takes place June 28 to 29. [Photo/Agencies]

Members of the Italian aerobatic team Frecce Tricolori perform during the AirPower 13 air show at the Hinterstoisser air base in Zeltweg June 28, 2013. [Photo/Agencies]