Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Iran Invites NTSB, Boeing to Participate in Ukrainian Plane CrashInvestigation Steve Herman Iran has invited the National Transportation Safety Board, the U.S. accident investigation agency, to participate in the probe of the Ukrainian Boeing commercial jetliner that crashed near Tehran earlier this week. The NTSB said in a statement Thursday it had received "formal notification" about the crash from the Aircraft Accident Investigation Board of the Civil Aviation Organization of Iran and is sending "an accredited representative to the investigation of the crash." Iran has also invited Boeing, the U.S. manufacturer of the plane, to be a part of the investigation team. It is not, however, immediately clear what level of participation the two U.S. entities would have in the investigation because of the U.S. sanctions placed on Iran and the heightened tensions between the two countries. Ukraine is also taking part in the investigation. .