america

Solar Impulse, piloted by AndrÈ Borschberg, takes flight during the second leg of the 2013 Across America mission, at dawn, Wednesday, May 22, 2013, from Sky Harbor International Airport in Phoenix. The solar powered aircraft is scheduled to land at Dallas/Fort Worth International Airport on Thursday May 23. The plane's creators, Bertrand Piccard and Borschberg, said the trip is the first attempt by a solar airplane capable of flying day and night without fuel to fly across America. (AP Photo/Matt York)

Matt York/AP

Solar Impulse, piloted by André Borschberg, takes flight during the second leg of the 2013 Across America mission at dawn on Wednesday from Sky Harbor International Airport in Phoenix, Arizona. 

Barack Obama, David Cameron...President Barack Obama and British Prime Minister David Cameron walk off the stage after their joint news conference,  Monday, May 13, 2013, in the East Room of the White House in Washington, where they talked about various topics including Syria's civil war. (AP Photo/Jacquelyn Martin)

Jacquelyn Martin/AP

US President Barack Obama and British Prime Minister David Cameron walk off the stage after their joint news conference on Monday in the East Room of the White House in Washington, where they talked about various topics including Syria’s civil war. 

Ariel Castro, Pedro Castro and Onil Castro appear in court in Cleveland,...Ariel Castro (R), Pedro Castro (C) and Onil Castro appear in court in Cleveland, Ohio, May 9, 2013. Ariel Castro, 52, a veteran school bus driver fired from his job last fall, was formally charged with kidnapping and raping the three women, who were rescued from his house on May 6 evening shortly before his arrest.  REUTERS/John Gress (UNITED STATES - Tags: CRIME LAW TPX IMAGES OF THE DAY)

John Gress/Reuters

Ariel Castro (R), Pedro Castro (C) and Onil Castro appear in court in Cleveland, Ohio on Thursday. Ariel Castro, 52, a veteran school bus driver was fired from his job last autumn, was formally charged with kidnapping and raping the three women, who were rescued from his house on Monday. 

The Dalai Lama attends the Anwar Sadat Lecture for Peace at the University of Maryland...Tibetan spiritual leader the Dalai Lama adjusts his University of Maryland visor while attending the Anwar Sadat Lejcture for Peace at the University of Maryland in College Park, Maryland May 7, 2013.    REUTERS/Gary Cameron  (UNITED STATES - Tags: RELIGION POLITICS)

Gary Cameron/Reuters

Tibetan spiritual leader the Dalai Lama adjusts his University of Maryland visor while attending the Anwar Sadat Lecture for Peace at the University of Maryland in College Park, Maryland on Tuesday.

U.S. President Obama delivers speech in Mexico City...U.S. President Barack Obama delivers a speech at the Anthropology Museum during his visit to Mexico City May 3, 2013.   REUTERS/Kevin Lamarque   (MEXICO - Tags: POLITICS)

Kevin Lamarque/Reuters

US President Barack Obama delivers a speech at the Anthropology Museum during his visit to Mexico City on Friday. 

US President Barack Obama and First Lady

Jewel Samad/AFP

President Barack Obama heads to Boston to mourn victims of the Boston Marathon attacks. No arrests have been made in connection with Monday’s twin bombings near the finish line of the race, which sent metal fragments and nails into a crowd of runners and spectators, killing three people and wounding 180.