In early season 14 when Agent Alex Quinn overhears that Clayton Reeves volunteered for Operation Willoughby she called it a "suicide mission" noting that the mission had even been pushed back 6 months because they weren't able to find anyone willing to volunteer for it.
It just makes Clayton's death that much more heartbreaking. He lived through Operation Willoughby and the capture/death of Chen. Something that NO ONE believed possible.
Only to die protecting Abby after a fun night out just when he was settling in nicely with his new found family.
Clayton Reeves deserved better.