Sydney currently has the honour of hosting the Invictus Games, which are a sporting event for armed service personnel, celebrating diversity and strength.
On the 2DayFM Breakfast, Ash London spoke about an incredibly emotional moment earlier this week, when a helicopter flew over an event at the Games, causing one of the athletes to suffer from a PTSD attack.
His partner came over and helped to ground the athlete, comforting him and reminding him that he was safe.
Damien Irish, squadron leader for the rowing team, spent 12 years in the army and spoke to the 2DayFM Breakfast's Grant and Ed about his life and PTSD after time in the armed forces.
"I wasn't diagnosed until many years after," he said.
"I didn't think there was anything wrong with me, until it all came crashing down."
Damien also spoke about Prince Harry and how much the Invictus Games mean to the athletes - as well as what it was like to meet the royals.
Missed 2DayFM Breakfast with Grant Denyer & Ed Kavalee this morning? Catch up with the full show below.