DES MOINES, Iowa (AP) -- Sen. Joe Biden, D-Del., said Monday that Democrats shouldn't shy away from pointing out Republican failures on national security. "If anything is shown by the British uncovering the plot on the airliners, it's simple -- we are not protected," Biden said. Biden, who has said he is seeking the Democratic presidential nomination, was in Iowa to campaign for Rep. Leonard Boswell, D-Iowa, who is in a heated re-election campaign in Iowa's 3rd Congressional District. Biden said the report of a bipartisan commission named to review the Sept. 11, 2001, terrorist attacks is an example of...