Gun camera footage shows the moment a Syrian fighter jet was shot down by a US Navy F/A-18s Hornet.
It was the first time a fighter had been shot down by US combat jets since May 4, 1999, when a Serbian MiG-29 was destroyed by a US F-16.
Now a detailed account of the June incident has been given by one of the pilots involved.
The US Navy fighters, which were operating from the aircraft carrier USS George H.W. Bush, were responding to calls from help from US-backed rebels operating to the south of the Islamic State capital of Raqqa.
They were being aggressively targeted by pro-President Bassar al-Assad forces.
Commander Tremel told how he flew off the USS Bush knowing things were tense.
The US had launched a Tomahawk missile attack on a Syrian airfield suspected of preparing chemical weapons in April. An Iranian drone had been shot down over Syria just days earlier.
The four F/A-18s took up station near the Syrian city of al Tabqua where Syrian Government forces were advancing on US-backed Syrian rebel forces fighting Islamic State — despite repeated warnings not to.
But they were not alone.
A Russian Su-27 strike fighter was also loitering high in the area.