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. Iranian President Rouhani Appeals for 'National Unity' After Protests VOA News Iranian President Hassan Rouhani called for "national unity" Wednesday after an eruption of protests over Iran's downing of a Ukrainian International Airlines plane. Iran initially said mechanical problems caused the commercial jetliner to go down, before admitting days later that Iranian military personnel mistakenly shot down the plane, killing all 176 people on board. The revelation sparked days of protests in Iran as people expressed their anger at the country's leaders. .