She waited on this grumpy old man every day without complaint. But when he passed away, she found out who he really was.
Anyone who has ever waited tables knows that you have to keep smiling, even when you end up with a table of guests who are doing anything but.
Waitress Melina Salazar is a master of this principle. When faced with a customer who never stopped complaining, grumbling, and making trouble, she always managed to serve him with a smile. In the end, she was the only waitress at Luby’s in Brownsville, Texas, who agreed to serve him at all.
This customer’s name was Walter “Buck” Swords. He was an 89-year-old WWII veteran. He was cranky and rude, sometimes even insulting the person trying to take his order. It was a nightmare for the waitstaff at the restaurant he patronized almost daily.

But there was Melina, day after day. With endless patience, she took his orders without a word of complaint and always managed to bring him the food just the way he wanted it. (He liked his meals piping hot, enough to burn a normal person’s tongue!) Despite his bad temper, she always responded with a generous smile.
Melina was asked to tell her story to the local media, which you can watch here:
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Source: Little Things