Richard Engel announces death of 6-year-old son

Richard Engel, NBC News' chief foreign correspondent, shared sad news Thursday that his 6-year-old son Henry has died.

"Our dearest child Henry died," Engel composed on Twitter.

Through a genetic test, doctors learned he had a mutation to his MECP2 gene.

The institute's Dr. Huda Zoghbi, who studied Henry's mutation, called him "special in so many ways."

In one more tweet on Thursday, Engel said

In the later exposition, Engel shared that he "at long last got a 'Dada'" from his child.

"It was bound to happen, which made it all the better — a startling award," he composed.

At the end of May, Engel had tweeted a video of Henry, writing that he had "taken a turn for the worse."

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