A U.S. Marine points his rifle at Afghan men ordered to raise their arms to show they're not carrying explosives in Farah Province, southern Afghanistan. (PHOTO CREDIT: DAVID FURST/AFP/Getty Images) FROM CNN's Jack Cafferty: Tomorrow marks eight years since the U.S.-led invasion of Afghanistan. Eight years and 865 U.S. troops killed – and the Obama … Continue reading White House says leaving Afghanistan is not an option. What are U.S.'s options?