Two operators scan the altar with a Ground Penetration Radar at the Convent of the Barefoot Trinitarians in the historic Barrio de las Letras, or Literary Quarter in Madrid, Spain, Monday, April 28, 2014. (AP Photo)

A newly wed couple poses for wedding photos on the filed of tulips near a replica Dutch windmill at Shunyi International Flowers Port in Beijing, China Monday, April 28, 2014. (AP Photo)

A woman cuts tomato plants in a greenhouse in Lutherstadt Wittenberg, Germany, April 28, 2014. The hearvest in the 15 hecaters greenhouse, which was inaugurated at the start of 2014, (AP Photo)

MotoGP rider Marc Marquez, of Spain, steers his Honda ahead of other riders after the start of the Argentina's Motorcycle Grand Prix at the Termas de Rio Hondo circuit, Argentina, Sunday, April 27, 2014. (AP Photo)

People dressed as blocks of currency notes as part of a marketing campaign take a break in Moscow April 28, 2014.(Photo:Reuters)

A woman walks with her greyhound dogs along a path in the Durand forest near the French border to Switzerland, in Ferney Voltaire April 28, 2014. (Photo:Reuters)

In this Feb. 28, 2014 photo provided by the New York Landmarks Conservancy, a stage curtain painted by Pablo Picasso hangs on a wall at the Four Seasons restaurant in New York. Plans to move the 1919 canvas from the Four Seasons has touched off a dispute between a prominent preservation group against an art-loving real estate magnate. (AP Photo)

The relics of Pope John Paul II _a vial of his blood _ built into a marble altar of a new sanctuary dedicated to the pontiff in Krakow, Poland, Sunday, April 27, 2014, (AP Photo)

Tourists enjoy a boat ride on a canal of the old town in Bruges April 28, 2014. (Photo:Reuters)

The Castelao stadium is reflected in water after heavy rain in Fortaleza, Brazil, Monday, April 28, 2014. (AP Photo)

FILE - In this Nov. 2, 2005 file photo, the Detroit skyline is shown along the Detroit River. Detroit has reached a tentative deal with unions that represent thousands of employees in the bankrupt city. Mediators announced Monday, April 28, 2014 (AP Photo)

This October 2013 photo provided by Jessie Veeder shows her riding a horse to chase cattle with her sister, husband and father, not pictured, on the Veeder Ranch in Watford City, N.D. Veeder's husband works in the oil fields. She blogs about her love of open space and her pride at living in the place her great-grandfather called home. But she says, "You can't have it both ways _ you can't have this real booming industry, all this economic growth and all this prosperity without having some repercussions." (AP Photo)

Thousands of Jewish youths from Israel and other countries march in silence between the two parts of Auschwitz-Birkenau Nazi German death camp in an annual 'March of the Living' in Oswiecim, Poland, on Monday, April 28, 2014, (AP Photo)

People take photographs of the U.S. navy warship USS Mount Whitney as it is towed up Tagus river to be docked at Lisbon's Jardim Tabaco dock, Monday, April 28, 2014. (AP Photo)

In this photo provided by the Cincinnati Zoo, a newborn giraffe calf stands next its mother, Monday, April 28, 2014, (AP Photo)

FILE - This April 25, 2011 file photo shows the residence once occupied by Enrico Ponzo outside Marsing, Idaho. Ponzo was convicted in Boston in November 2013 of several federal crimes, including the 1989 attempted killing of Francis "Cadillac Frank" Salemme. Ponzo fled Massachusetts in 1994 and landed in Idaho where he spent more than a decade as a cattle rancher and stay-at-home father. He is scheduled to be sentenced in federal court Monday afternoon, April 28, 2014, in Boston. (AP Photo)

A pupil lays flowers outside Corpus Christi Catholic College after teacher Anne Maguire was fatally stabbed in Leeds, northern England April 28, 2014. (Photo:Reuters)

A boy rests his pet pigeon on his head as he plays with it in a slum in Mumbai April 28, 2014. (Photo:Reuters)