Book excerpt: "In A Nation on Fire, journalist Clay Risen relies on dozens of interviews and reams of newly declassified documents to offer a sweeping day-by-day, city-by-city account of the riots, from the looting and burning in Washington to explosions of violence in Chicago, Baltimore, Kansas City, and 117 other cities, large and small. Taking readers inside the Oval Office, the Pentagon, and city halls across the country, he introduces them to key players at every level - from the first army soldier to enter Washington to the crack team of Johnson aides who managed the crisis from inside the White House to the civil rights leaders who helped avert violence in Memphis, where King was shot."--BOOK JACKET.