Photo taken on Jan. 8, 2020 shows Iranian soldiers working at the crash site of the Ukrainian passenger plane in Parand district, southern Tehran, Iran. Iran has asked the French and U.S. accident investigation agencies, the BEA and NTSB respectively, for the equipment to decode the black box of the crashed Ukrainian plane, Press TV reported on Tuesday. On Jan. 8, the Ukrainian Boeing 737-800 aircraft from Tehran to Kiev crashed near Tehran's Imam Khomeini International Airport, killing all the passengers and crew members on board. (Photo by Ahmad Halabisaz/Xinhua)