American superheroes - from Captain America to Iron Man, Thor and Spiderman - have praised in recent days the bravery of a six-year-old boy who was maimed in the face after he intervened to protect his sister from a dog attack.

"You are a hero," said Chris Evans, who plays Captain America in the Avengers series of movies the little boy loves. What I've done is very brave. Your sister is lucky to be her older brother. Your parents must be very proud of you. ”

Bridger Walker (six years old) stood on the ninth of July in the face of a German Shepherd dog who was preparing to attack his four-year-old sister.

The dog bitten him in his cheek, and underwent an emergency surgery by a plastic surgeon with 90 stitches. His parents confirmed that he told them after that, "If someone must die, it must be me."

His story spread like wildfire through American social media, and many celebrities responded to the call made by a relative of the child via "Instagram" to send messages of support to him.

Actor Robert Downey Jr., who plays Iron Man, promised Bridger "something special" for his upcoming birthday.

Chris Hemsworth, who portrayed Thor in several films from the world of "Marvel", praised the boy's "unspeakable bravery."

"I impressed all of us," he said. I know that you are a fan of Avengers, and all my colleagues and I are delighted to have you included in our team. ”

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