Overview: Headlines for August 24, 2016; Day After Obama Tours Louisiana Flood Damage, Gov't Holds Massive Gulf Oil & Gas Lease Auction; Climate Study: By 2085 All U.S. Cities Except San Francisco Will Be Too Hot to Host Summer Olympics; Inaction on Climate Change Could Cost Millennials $8.8 Trillion in Lifetime Income; Embracing the Alt-Right: New Trump Campaign Chief 'Created an Online Haven for White Nationalists'