Friday: The day in pictures

Agnes Szavay from Hungary serves the ball to Amelie Mauresmo at the Madrid Open Tennis in the Caja Magica, Madrid.  (Daniel Ochoa de Olza / Associated Press)

Olympic gold medalist Michael Phelps swims the preliminary men’s 200 freestyle during the U.S. Swimming Grand Prix Series Charlotte Ultraswim in Charlotte, N.C.. Phelps recorded a time of 1:50.46.  (Gerry Broome / Associated Press)

A police officer stands guard outside the Walter Crowley Intermediate School, one of three closed due to flu fears in the Queens borough of New York City. The Queens public schools have been closed for a week because of an outbreak of the swine flu, the most extensive action taken by the New York Public School system since the virus arrived nearly a month ago.  (Chris Hondros / Getty Images)

Italy’s Danilo Di Luca retains the leader’s pink jersey as Lance Armstrong bears down during the seventh stage of the 92nd Giro of Italy cycling race. Boasson Hagen of Norway, riding for Columbia, won the seventh stage of the Tour of Italy today while Danilo Di Luca remains first in the overall rank and keeps the pink jersey.  (Damien Meyer / AFP/Getty Images)

Minister Scott Rennie rehearses a sermon in Brechin Cathedral in Brechin, Scotland. Church of Scotland leaders are set to make a decision over the appointment of the openly gay minister to Queen’s Cross church in Aberdeen. So far, a fifth of all clergy have signed a petition against Rennie’s appointment.  (Jeff J. Mitchell / Getty Images)

A baby giraffe stands next to its father in their enclosure at the zoo in Berlin. The young giraffe was born on April 18 in the zoo.  (Dennis Gundlach / AFP/Getty Images)

Kentucky Derby winner Mine That Bird, ridden by Charlie Figueroa, on the track in preparation for the 134th Prerakness Stakes at Pimlico Race Course in Baltimore.  (Matthew Stockman / Getty Images)

Polar bear Knut plays with an old soccer ball in the pool of his enclosure at the Berlin Zoo.  (Maya Hitij / Associated Press)

People visit the so-called “Tree of Life” in Sakhir, Bahrain. The 400-year old mesquite tree stands alone in the desert, the source of its water a mystery, and people from around the world make the pilgrimmage to the site.  (Hasan Jamali / Associated Press)