Photo of the day

Tony Pollard in the library at Jasna Gora Monastery, Poland. In 1655 the monastery defended itself against an onslaught from the Swedish army. This is from Defending Europe.

Claude Marie poses is interviewed for "Killer Lies: Chasing a True Crime Con Man," a documentary series about obsession and deception, following the unraveling of Stephane Bourgoin’s career as a best-selling author and serial killer expert. This is from Killer Lies.

A reenactor firing a musket at Belfort Citadel, France. The iconic site played a vital role in the Franco-Prussian war. This is from Defending Europe.

Air Enforcement Agent Murray walks across a tarmac to a CBP air vehicle in San Diego, Calif. This is from To Catch a Smugler Season 7.