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day known as bloody sunday. on this day in 1965, 600 people began a march from selma to montgomery, demanding an toned discrimination in voter registration. marchers were beaten by white state troopers, including the late congressman john lewis, as they tried to cross the edmund pettus bridge. it helped spark outrage. cnn's arlette saenz is joining us right now. arlette is there in selma for the event today. the president is expected to make his own case for maintaining, restoring lost voter rights. >> reporter: yeah, fred, he is. the president will make his arguments against the bac...

The national park service tweeted, if you come across a bear, never push a slower friend down. a little humor there. they tend to do that. but that, too, is very serious. you mentioned, of course, a mamma bear, mamma moose, fierce. as people are out there trekking in the snow in the winter months, they come across bear perhaps that are not hibernating. what do you do? >> that's an entering bit of advice from my dear friends at the national park service and the fish and wildlife service. i am a very -- i'm not so altruistic. i have a buddy technique. fred, if we're out there and we see a grizzl...