China's vice president, Xi Jinping, who is poised to become the country's new leader, is widely traveled and stayed briefly in Muscatine, Iowa, in the 1980s. He returned again in February of this year and met some of the people he knew from his earlier visit. Xi, right, is shown greeting Muscatine resident Eleanor Dvorchak. Kevin E. Schmidt/AP hide caption

Chinese schoolchildren during lessons at a classroom in Hefei, east China's Anhui province, in 2010. STR/AFP/Getty Images hide caption

President Obama speaks at the southern site of the Keystone XL pipeline in May in Cushing, Okla. Obama is under pressure to make a decision on the future of the pipeline during his second term. Tom Pennington/Getty Images hide caption

A supporter of President Barack Obama raises his arms as it is announced that Obama was re-elected during an election night watch party in Chicago. Jerome Delay/AP hide caption

US troops from the 1-91 Cavalry patrol in Baraki Barak district in Logar Province, south of Kabul. Insurgents carry out frequent attacks in the area. The U.S. is trying to improve the capabilities of Afghan forces so they will be able to take control when U.S. troops leave. Sean Carberry/NPR hide caption

At the Bescanó municipal theater in northeastern Spain, director Quim Marcé (center) and actresses Meritxell Yanes (left) and Elena Martinell (right) display carrots for sale. Quim Marcé hide caption

Four U.S. soldiers, runners for the 315th Infantry, pose in France in November 1918. The troops reportedly carried official orders to Lt. Col. Bunt near Etraye, France, shortly before noon, Nov. 11, 1918, announcing that the armistice had been signed, thereby ending World War I. AP hide caption