In hour two of Here & Now’s April 13, 2018 full broadcast, we check in with NPR’s Ryan Lucas, who has an advance copy of fired FBI Director James Comey’s much-anticipated memoir. Also, “The Simpsons” has reigned on TV for nearly three decades, but a recent episode drew new attention to how the show handles racial stereotypes. And an ocean current that helps regulate the global climate system is slowing down. That’s the conclusion of two new studies published in the journal Nature. Scientists disagree about what’s behind the weaker ocean currents, but it could be bad news for the climate.