Jack Devine, the former acting director of the CIA and founding partner and of the Arkin Group, tells Pimm Fox and Lisa Abramowicz why it's time for negotiation, not military action, with North Korea. Lionel Laurent, a Bloomberg Gadfly columnist covering finance and markets, talks about why Angry Birds maker Rovio Entertainment's planned IPO comes with risks. Eric Balchunas, a senior ETF analyst at Bloomberg Intelligence, discusses Vanguard's growing dominance in asset management and how ETF inflows this year have already eclipsed last year's annual record. Finally, Mike McDonaugh, the global director of economic research and chief economist at Bloomberg Intelligence, talks about why NAFTA renegotiations are expected to be painless.