* Biden campaign tackles age concerns as president turns 81 CBS News
* Biden insiders want him to walk 'shorter distances on camera,' wear shoes that reduce falling risk: Report Fox News
* Joe Biden Turns 81, Setting New Record as Oldest Sitting President in U.S. History | News18 | N18V CNN-News18
* President Biden is 81 today: Who was oldest president? Youngest? AL.com
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