In the wake of ongoing protests in the US against the killing of black men by police, more than to 100 people were arrested in Baton Rouge, Louisiana, on Saturday.
In the wake of the demonstrations, and growing debate over the seeming militarisation of American police, one photo has stood out.
It was taken by Jonathan Bachman, a New Orleans-based photographer who has been working for Reuters in the past few days.
The image shows a young woman in a dress standing calmly in front of two police officers wearing layers of armour, and appearing to approach her in a hurry.
Among the most prominent people to share the image on Facebook was Shaun King, a senior justice reporter with the New York Daily News newspaper with more than 560,000 followers.
One comment beneath his post, liked more than 3,300 times, called it a “legendary picture” that “will be in history and art books from this time”.
The photograph was taken outside the Baton Rouge police headquarters, where most of Saturday’s protest was focused.
The demonstration took place days after police killed Alton Sterling in Baton Rouge. A video showed two white police officers holding him down and shooting him. Police said they had received a report an armed man was making threats.
Reuters said the woman in the photo, which was taken on Saturday, was later detained, but little more is known about her and she has not yet been named.
Other notable figures online to share the image include Calestous Juma, a Kenyan-born professor at the John F Kennedy School of Government, who was once named among the 100 most influential Africans.
British-Indian novelist Hari Kunzru praised the “grace under pressure” shown by the woman in the photo.
Another angle of the incident was captured by Associated Press photographer Max Becherer.
AP reported that the woman in the photograph was grabbed by officers after refusing to move off the public highway.
The protests were not entirely peaceful – Louisiana’s The Advocate newspaper said 102 people were arrested, with eight guns seized. One police officer lost several teeth after being hit by a projectile, it said.
Mr Bachman was unavailable for comment. – but many more of his photographs from Baton Rouge on Saturday have been used worldwide.