‘The Circus’ explores ‘distinctly American’ history, and how TV toppled the big top

(CNN)Stop if you’ve heard this one: A “clearly American” mass-entertainment organization flourishes for many years, prior to its company design gets weakened by brand-new innovation. Just with “The Circus,” a strangely prompt PBS documentary, it’s the “biggest program in the world” that succumbed to a brand-new shipment system– specifically, tv.