Plane crashes

FILE - In this Wednesday, Dec. 11, 2019, file photo, a Boeing 737 Max being built for Norwegian Air International taxis for a test flight, at Renton Municipal Airport in Renton, Wash. Newly released Boeing documents show that company employees knew about problems with flight simulators for the now-grounded 737 Max jetliner and talked about misleading regulators. (AP Photo/Ted S. Warren, File)

Secretary of State Mike Pompeo briefs reporters about additional sanctions placed on Iran, at the White House, Friday, Jan. 10, 2019, in Washington with and Treasury Secretary Steve Mnuchin. (AP Photo/ Evan Vucci)

In this handout photo provided by the Ukrainian Presidential Press Office, Ukrainian President Volodymyr Zelenskiy leads a meeting of the emergency response team on the crash of the Ukraine International Airlines plane in Iran, in Kyiv, Ukraine, Thursday, Jan. 9, 2020. A Ukrainian passenger jet carrying 176 people has crashed just minutes after taking off from the Iranian capital's main airport, turning farmland on the outskirts of Tehran into fields of flaming debris and killing all on board. (Ukrainian Presidential Press Office via AP)

Members of Montreal's Iranian community attend a vigil, Thursday, Jan. 9, 2019 in downtown Montreal. It is “highly likely” that Iran shot down the civilian Ukrainian jetliner that crashed near Tehran late Tuesday, killing all 176 people on board, U.S., Canadian and British officials declared Thursday. They said the fiery missile strike could well have been a mistake amid rocket launches and high tension throughout the region. (Andrej Ivanov/The Canadian Press via AP)

Secretary of State Mike Pompeo and Treasury Secretary Steve Mnuchin brief reporters about additional sanctions placed on Iran, at the White House, Friday, Jan. 10, 2019, in Washington. (AP Photo/ Evan Vucci)

This image taken from a video on Wednesday Jan. 8, 2020 and provided by Nariman Gharib shows an object said to be the Ukrainian jetliner flying in sky at the moment of explosion with a flash of light. Western leaders have said the plane appeared to have been unintentionally hit by a surface-to-air missile near Tehran, just hours after Iran launched a series of ballistic missiles at two US bases in Iraq to avenge the killing of its top general in an American airstrike last week. Iran on Friday Jan. 10, 2020, denied the allegations. (Courtesy of Nariman Gharib via AP)

FILE - In this July 7, 1988 file photo, Iranian mourners carry one of 72 caskets to the Cemetery of Martyrs after attending a "Death to America" rally outside the Majlis, or Iranian parliament, in Tehran, Iran. The Western allegation that Iran shot down a Ukrainian jetliner and killed 176 people offers a grim echo for the Islamic Republic, which found itself the victim of an accidental shootdown by American forces over 30 years ago. (AP Photo/Greg English, File)

Rescue workers carry the body of a victim of a Ukrainian plane crash in Shahedshahr, southwest of the capital Tehran, Iran, Wednesday, Jan. 8, 2020. A Ukrainian passenger jet carrying 176 people crashed on Wednesday, just minutes after taking off from the Iranian capital's main airport, turning farmland on the outskirts of Tehran into fields of flaming debris and killing all on board. (AP Photo/Ebrahim Noroozi)

FILE - In this Wednesday, Jan. 8, 2020 file photo, bodies of victims of a Ukrainian plane crash are collected by rescue team at the scene of the crash in Shahedshahr, southwest of the capital Tehran, Iran. Two U.S. officials said Thursday that it was “highly likely” that an Iranian anti-aircraft missile downed a Ukrainian jetliner late Tuesday, killing all 176 people on board. President Donald Trump is suggesting he believes Iran was responsible. (AP Photo/Ebrahim Noroozi, File)