The retired pilot famous for safely landing disabled US Airways Flight 1549 in the Hudson River back in 2009, has penned an op-ed in The New York Times calling out President Trump’s daughter-in-law, Lara Trump, for seemingly mocking 2020 presidential candidate Joe Biden‘s speech impediment.

Capt. Chesley “Sully” Sullenberger says he was once was a stutterer, and opened his piece reminiscing about how his stutter affected his life while growing up in Denison, Texas.

“Those feelings came rushing back when I heard Lara Trump mocking former Vice President Joe Biden at a Trump campaign event, with the very words that caused my childhood agony,” Sullenberger wrote.

During a “Women for Trump” event in Iowa this Thursday, Lara Trump, seemingly mocked Biden’s speech impediment and suggested the Democrats are in big trouble having him as a front runner in the 2020 election. “Every time he comes on stage and they turn to him, I’m like, Joe can you get it out, let’s get the words out, Joe,” she said. “You kinda feel bad for him.”

Although he’s a Biden supporter, Sullenberger says his disgust with Lara Trump goes “beyond politics.”

“Stop. Grow up. Show some decency. People who can’t have no place in public life,” Sullenberger wrote.

He then directed a message to children who stutter.

“You are fine, just as you are,” he wrote. “You can do any job you dream of when you grow up.”

“You can be a pilot who lands your plane on a river and helps save lives, or a president who treats people with respect, rather than making fun of them.”

Read his full op-ed over at The New York Times.

Featured image via screen grab/YouTube