demand change one step at a time. today s mayday rally is expected to draw about 100,000 people. this city is no stranger to big, huge demonstrations. in 2006, the mayday demonstration attracted 500,000 people. alex, back to you. okay, thank you very much. christina brown, check in good enwith you. tornadoes are ripping through arkansas and they killed at least one person and injured more than two dozen others. the twisters damaged several homes, trees, brought down power lines as well. search crews are still looking for victims in other areas. reported statement damage. crews in central arkansas clean up and assess the damage, more severe weather could be on the way. coming up, charlie crist is swapping parties. will the voters follow him? nbc s lester holt reporting live from the disaster zone in louisiana with a look at the lives being devastated by the oil spill and what s being done to stop the flow into the gulf. [ male announcer ] dear user of mayo,