Former Democratic senator Russ Feingold of Wisconsin discusses the ways in which he thinks America got its response to 9/11 wrong. Sculptor Will Ryman talks about “Anyone and No One,” his new exhibit of site-specific works in Chelsea. Today’s edition of A History of the World in 100 Objects looks at a coin with the head of Alexander the Great on it. Haydn Gwynne talks about her role as the widowed Queen in the new production of “Richard III” now at BAM. Plus, we’ll look at the sexual counterrevolution and the impact fights over birth control, gay rights, and abortion are having on the 2012 election.