chet dyerson is working to help find the cure for spinal cord injuries.was paralyzed in a motocross accident 11 years ago. five weeks ago he set out from southern california to the nation's capital in a motorized wheelchair that he built himself. that chair goes about 55 miles an hour. so he gets a lot of looks from drivers and he gets a lot of questions from police. >> i built this gas-powered wheelchair, and i decided that i would go do something for spinal cord research. something i've never done anything like this before, and just kind of jumped into it. didn't know what i was doing, learned a lot on the road. >> chet dyerson says he hopes to get the attention of members of congress and the president before he leaves d.c. >>> after the break, an all-american pop quiz on this independence day eve. >> ooh, i love quizzes. >[ kate ] if this icelandic mud could work wonders on my skin, imagine what it could do for my business. now, i just had to figure out a way to get it back to the states. so i called john, my citibank small business expert. [ john ] ka