Robert Dean Stethem (November 17, 1961 – June 15, 1985) was a United States Navy Seabee diver who was murdered by Hezbollah terrorists during the hijacking of the commercial airliner he was aboard, TWA Flight 847. At the time of his death, his Navy rating was Steelworker Second Class (SW2). He was posthumously promoted to Master Chief Constructionman (CUCM).
On June 14, 1985, Stethem was returning from an assignment in Nea Makri, Greece aboard TWA Flight 847 when it was hijacked by members of the Lebanese pro-Iranian organization Hezbollah. The hijackers held 39 people hostage for 17 days, demanding the release of 766 Lebanese and Palestinian prisoners held by Israel.
When their demands were not met, Stethem, as a member of the U.S. military, was targeted, beaten, and tortured. Finally, the hijackers shot him in the temple and dumped his body onto the tarmac at the Beirut airport.
One of the hijackers, Mohammed Ali Hammadi, was arrested two years later in Frankfurt, Germany. He was tried and convicted of Stethem's murder and sentenced to life in prison but was released in 2005 after serving 19 years. Three others, Imad Mugniyah, Hassan Izz-Al-Din, and Ali Atwa, were eventually indicted for their involvement in the incident. In 2002, they were added to the FBI Most Wanted Terrorists list. On February 13, 2008, Mugniyah was killed in an explosion in Damascus, Syria.