this morning on "world news now" -- tornado terror. twisters take aim at tulsa overnight. as people scramble to safety. today's storm threat after an unforgettably frightening week courtesy of mother nature. >> matthew perry's long time struggle and why he wants everyone to learn from it. >> i was getting very sick, i had to do something about it >> how perry is spreading the word about something that is no laughing matter. world champion. the 13-year-old boy from queens, new york, and the word that won the national spelling bee. k-n-a-i-d-e-l. knaidel. >> that unusual word, the boy's