A short conversation with: BRAD WALKER

OSAKA, Japan—Brad Walker (left, /photo by Paul Merca), a 2005 University of Washington graduate and school record holder in this event sat down for a brief chat Friday afternoon, after he easily qualified for the finals of the world championships Thursday night, clearing 18-8 1/4.Walker, who is one of the favorites to win the world title, and who has the highest vault in the world this year at