(CNN) As President Donald Trump's motorcade drove to Indianapolis International Airport, this is the sight that greeted it:

A man taking a knee on the sidewalk. In his hand, a folded American flag.

The photo was shot Wednesday by a photographer accompanying the President as he left Indianapolis after delivering a speech on tax cuts at the state fairgrounds.

The photo offers no other detail about the man, or whether he's a veteran.

After Trump criticized football players who kneel during the National Anthem to protest police brutality, there have been numerous instances of veterans, athletes and others taking a knee in solidarity. There has also been a backlash over the protests

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