Steve and Bucky both attend Sam's support group frequently. Talking about their own experiences with PTSD
After hearing about this all of The Avengers start to attend Sam's group when they can. It gives the veterans hope that even superhero's struggle and they're still hero's.

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Marvel Headcannons
FanficAll of these are on tumblr I don't own there The mcu franchise belongs to marvel and the late stan lee