【】Credit: screenshot/reddit

John McCain, the Vietnam veteran and U.S. Republican senator, has been diagnosed with a particularly aggressive type of brain tumour, according to his office.。

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Numerous personalities from the whole political spectrum voiced their support for the Arizona Republican, who competed against Barack Obama in the 2008 presidential campaign.。

But it was a picture of young McCain, when he was in the Navy, that captured people's imagination and spurred touching tributes after it was posted on Reddit: 。

Credit: screenshot/reddit。

Credit: screenshot/reddit。

The photo shows McCain with his squadron and a T-2 Buckeye trainer in 1965.。Mashable Top StoriesStay connected with the hottest stories of the day and the latest entertainment news.Sign up for Mashable's Top Stories newsletter
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It was shot two years before he was captured and was forced to spend five and a half years in captivity as a POW in North Vietnam.。

People expressed their support by telling stories of when they accidentally met him:。

Credit: screenshot/reddit。Others called him a real American hero to be proud of:。Credit: SCREENSHOT/REDDIT。

Credit: SCREENSHOT/REDDIT。

Credit: SCREENSHOT/REDDIT。Democrats also expressed their solidarity: 。

Credit: SCREENSHOT/REDDIT。

Credit: SCREENSHOT/REDDIT。

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Everyone told him to hold on and keep up the fight:。

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Credit: SCREENSHOT/REDDIT 。

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