Come Sunday, the cable news networks — and plenty of other outlets — will kick off a 72-hour marathon of Barack Obama coverage and programming tied to Tuesday’s inauguration of the nation’s 44th commander-in-chief.

From channels around the world to such Internet vidcasters as Hulu to the blogger brigade, the inaugural and related events will generate more video footage and reportage than ever before.

“This year, the inaugural (schedule) is bigger and more complex and vast than I’ve ever seen it,” said David Bohrman, CNN’s Washington bureau chief and a 30-year vet of presidential pomp and circumstance.

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