Finally tonight, "america strong." the children's lemonade stand that has customers lining up from all over, and some willing to pay top dollar for a cause. >> hello. i'll take a lemonade and a cotton candy. >> reporter: the lemonade at this stand outside oklahoma city is tasty, but the story behind it is even sweeter. >> thank you. >> have a nice day. >> reporter: it was created by friends of 7-year-old will hughes, who has been fighting leukemia since november. >> we took him to the pediatrician, and he got sent to the hospital in critical condition. >> reporter: will has just finished six m...