A war of words has intensified between the United States and Iran following the collapse of their ceasefire agreement. U.S. President Donald Trump has warned that any attempt on his life by Iran would result in the country's complete destruction. Meanwhile, Iran's Supreme Leader Mojtaba Khamenei has declared that avenging the death of his father is a "national demand."In a statement issued on March 8, following an extended period of national mourning, Khamenei said, "We will certainly avenge the...