Actor Charlie Sheen, who is known for his philanthropic nature, says hellparticipate in an upcoming charity race in Chicago. The 46-year-old will don his running shoes forPancreatic Cancer Research's Dash For Detection challenge, a five kilometer run or walk. The event isslated to take place next month, reported Contactmusic. "Hello Chicago!! I'll be there to scoot... Walkor Run! Dash for detection for pancreatic cancer research June 2 in Chicago," the former Two and a HalfMen star posted on Twitter.