I've seen them surround the Federal building in Atlanta with tanks on several occassions. Don't know if it's routine training or a response to
something, but this is the age we live in.
On a recent trip to NY City (last weekend) three gun-mounted, armored tanks/vehicles were driving through the streets of Manhattan. I took these pictures with my camera phone (hence the crappy quality).
I couldn’t believe how many people just waved at the armed soldiers peeking out of the top, many even cheered loudly in support. Nobody took the time to say, “why the hell are armed soldiers and tanks rolling down the middle of the street?!”
This happened the day after I saw a NYPD officer in Times Square – he was simply standing around watching the pedestrian traffic, the only thing out of place… he was carrying a machine gun!