Mark Memmott

Nothing about what happens during today's Republican presidential primaries in five states is expected to change the fact that Mitt Romney is the presumptive/expected/presumed/inevitable (pick your favorite word) nominee.

Polls are open in Connecticut, Delaware, New York, Pennsylvania and Rhode Island. There are 209 convention delegates at stake and Romney could pull off a five-state sweep.

But — and there's always a but — there's this:

If you're into images of Earth taken from space, NASA has a new video for you. Called Walking on Air, it "features a series of time lapse sequences photographed by the Expedition 30 crew aboard the International Space Station" and is set to the song Walking in the Air by Howard Blake.

While the headlines proclaim that thanks to a new draft agreement the U.S. will continue to defend Afghanistan for a decade after the planned 2014 withdrawal of foreign combat forces from that country, the stories themselves make clear that many of the key details remain to be worked out:

Good morning.

Our early headlines:

-- Several More Secret Service Agents Tied To Scandal Likely To Lose Their Jobs.

-- Zimmerman Released After Posting Bail, Will Go Into Hiding But Be Monitored.