FILE - in this March 4, 2011 file photo, Libyan rebels who are part of the forces against Libyan leader Moammar Gadhafi stand with an anti-aircraft gun as they prepare to fight on the front-line near Ras Lanuf, west of the town of Brega, eastern Libya. Ten years ago, an uprising in Tunisia opened the way for a wave of popular revolts against authoritarian rulers across the Middle East known as the Arab Spring. For a brief window as leaders fell, it seemed the move toward greater democracy was irreversible. Instead, the region saw its most destructive decade of the modern era. (AP Photo/Kevin Frayer, File)