CNN News:导弹袭击还是技术问题? 乌克兰客机坠毁原因众说纷纭

Between Iran and the United States military attacks and revenge attacks have dominated the headlines over the past couple weeks. But there's another event under investigation in Iran and abroad. A plane crashed in the Iranian capital of Tehran on Wednesday. It was a Ukrainian passenger jet headed from Iran to Ukraine and it went down shortly after take off.
All 176 people on board were killed. At first, Iranian and Ukrainian officials suggested that technical problems caused the crash. But yesterday Ukrainian authorities said they were also considering terrorism and a missile strike as possible causes. And U.S. officials said it appeared Iran shot down the plane with two surface to air missiles. Why? Several sources including U.S. President Donald Trump and Canadian Prime Minister Justin Trudeau, say Iran could have done this by mistake. The plane crash happened within hours of Iran's missile attack against two military bases where U.S. troops were staying.

If Iran thought a revenge attack was coming, it might have mistaken the Ukrainian passenger jet as a threat and shot it down. To be clear, that's just one theory that observers have. Formal investigations are taking place and Iran denies shooting down the plane. It says the accusations are part of psychological warfare against Iran. Meanwhile, tensions remain high in the Middle East between that country and America but historically speaking that's nothing new.