WATCH: US sub sinks Iranian ship by torpedo in Indian Ocean, 1st such attack since WWII

A U.S. submarine used a torpedo to sink and Iranian ship in the Indian Ocean Tuesday, the first such attack since WWII , the Pentagon said.

​A U.S. submarine used a torpedo to sink and Iranian ship in the Indian Ocean Tuesday, the first such attack since WWII , the Pentagon said.  Politics A U.S. submarine used a torpedo to sink and Iranian ship in the Indian Ocean Tuesday, the first such attack since WWII , the Pentagon said.