Nia-Malika Henderson, national political reporter for The Washington Post and the anchor blogger for the Post's "Election 2012" blog, discusses how both campaigns are positioning themselves in the wake of Mitt Romney's choice of Congressman Paul Ryan as his running mate. Plus, what the selection of Chris Christie to deliver the keynote address at the Republican Convention means.

Fast Company reporter Neal Ungerleider talks about the new joint NYPD/Microsoft endeavor to monitor parts of Manhattan.

Linguist John McWhorter, a contributing editor at the New Republic and the author of What Language Is (And What It Isn’t and What It Could Be), talks about language and how we use it and change it.

Jennifer Burns, assistant professor of history at Stanford and author of Goddess of the Market: Ayn Rand and the American Right, discusses the life and work of Ayn Rand and her influence on GOP VP candidate Paul Ryan and the political right more broadly.

In the wake of the Vatican's harsh rebuke of the Leadership Conference of Women Religious (LCWR), we talk with Barbara Marx Hubbard, the keynote speaker at the LCWR's recent Assembly.

Bonnie Fuller, editor-in-chief of HollywoodLife.com and former editor of Cosmopolitan, Glamour and Us Weekly, reflects on the life of Helen Gurley Brown, who passed away yesterday at age 90. Helen Gurley Brown wrote Sex and the Single Girl and was the influential editor of Cosmopolitan before Fuller took the helm. She is credited with influencing the sexual revolution and creating the idea of the "Cosmo Girl."