On January 9 , 2007 Semba held the sixth Gordon Conference on carotenoids in Ventura , California under a title of '' Relationship of Carotenoids to Muscle Strength and Physical Performance in Older Adults '' . On May 8 of the same year he spoke at the seminar at the University of Washington on the '' Free Radical Theory of Aging '' and by July 11 was a public speaker at European Nutrition Congress in Paris , France . On the anniversary of September 11 attacks he held a conference on '' Nutrition and Aging '' in Little Rock , Arkansas which was the same one that he had in May of same year
September 11 attacks
September 11 attacks
Richard David Semba