Hooray! New Mockingjay set photos are here! Thanks to the Daily Mail we have a peek at The Hunger Games: Mockingjay set in Atlanta and a tiny sliver of Jennifer Lawrence's beautiful mug inside a voluminous hood (most of the pics feature her stunt double), some Peacekeepers and Capitol citizens.
Looks like Jackson Spidell, who played our District 10 tribute in Catching Fire and was Sam Claflin's stunt double is also playing a Peacekeeper in Mockingjay. He has his helmet off in the photo below.
The large stone objects above are called Czech hedgehogs. They are an anti-tank defense that were widely used by Soviets in World War II. Czech hedgehogs were especially effective in urban combat, where a single hedgehog could block an entire street. They became a symbol of "defence at all cost" in the Soviet Union. Sounds like a perfect fit for The Capitol. (thanks to our followers Don Carpenter and Liam Baker for this info!)