Today at 1 p.m., a former CIA agent will team up with a Yonkers firefighter for a live-painting performance. Allow us to explain: The former Fed is Hank O’Neal, a longtime East Village photographer who goes by the handle XCIA. And the firefighter is Jef Campion, better known as Army of One.

Last week, guerrilla-art aficionados spilled onto East Ninth Street as the Dorian Grey Gallery hosted the opening of “Street Artists Unite!” For the exhibit, artists like Mr. Campion and John “Crash” Matos (whose work showed at TT Underground before The Melvins moved in) tagged the photos of Hank O’Neal, whose snaps of international street art were recently published in “XCIA’s Street Art Project: The First Four Decades.” (Mr. O’Neal’s Website features a gallery of his photos of the East Village from 1986 to 2010.)

Christopher Pusey, director of the Dorian Grey Gallery, spoke to The Local about the exhibit, which also features the work of AV ONE, BTA, COPE2, ENX, Fumero, Kid Lew, Screwtape, SEE One, Chris Stain, TMNK, and Robots Will Kill. It remains on display at 437 East Ninth Street, near Avenue A, through Aug. 5.