**FILE** U.S. Ambassador David Jacobson shakes hands with Sister Constance Murphy before presenting a letter of congratulations from President Obama at the Convent of Sisters of St. John the Divine in Toronto on Dec. 4, 2009. (Associated Press)
This March 29, 2010, file photo shows Ship Salvage Unit members of the South Korean Navy preparing to set out on a search mission to find missing sailors from the sunken South Korean navy ship near South Korea's Baengnyeong Island. The 1,200-ton Cheonan, on a routine patrol with other vessels, went down near the tense maritime border with North Korea following a mysterious explosion. On July 9, 2010, investigators from South Korea, the U.S., Britain, Australia, Canada and Sweden concluded that it was struck by a torpedo of North Korean origin. (AP Photo/Ahn Young-joon)
** FILE ** Sen. Ben Nelson, D-Neb., talks to reporters on Capitol Hill in Washington, Monday, Dec. 21, 2009. (Katie Falkenberg/The Washington Times)
** FILE ** Derek Jenkins, an employee at Baldor Electric Co., moves a large roll of steel inside the company's factory in St. Louis in June 2009. (AP Photo/Jeff Roberson, File)
** FILE ** Archbishop of Canterbury Rowan Williams speaks during a news conference in London in October 2009. (AP Photo/Matt Dunham, File)
**FILE** In this photo from Nov. 16, 2009, packages move along a conveyor system to outgoing truck for final shipment inside the 800,000 sq. ft. Amazon.com warehouse, in Goodyear, Ariz. (Associated Press)
** FILE ** Third Street Diner employee Jessica Prignano takes a smoke break at the bar in the diner in Richmond in November 2009. (AP Photo/Steve Helber, File)
The Kyrgyz flag flies at half-staff in front of the Freedom statue on a central square in Bishkek, Kyrgyzstan, on Friday, April 9, 2010. (Associated Press)
** FILE ** West Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch coal mine on Monday, April 5, 2010, in Montcoal, W.Va. (AP Photo/Jeff Gentner)
