4 May 2012
Last updated at 17:06
On May Day, demonstrators took to the streets of Lisbon to protest against economic cuts by the Portuguese government.
Workers wear panda costumes as they carry a box which will be used to transport giant pandas back to the wild at the Wolong National Nature Reserve in China.
Exeter schoolchildren wait with inflatable corgi dogs for the arrival Queen Elizabeth II and the Duke of Edinburgh, who were visiting the south-west of England as part of their Diamond Jubilee Tour of the country.
Boxer Lavarn Harvell connects with the head of Tony Pietrantonio for a knockout during their third round of a light heavyweight boxing fight in Atlantic City, New Jersey.
Scarlett Johansson has received the 2,470th star on the Hollywood Walk of Fame. The actress said she was surprised to learn that her name would be placed on the famed Hollywood Boulevard.
A Caterham F1 mechanic marks wheels in the paddock of the Mugello racetrack during the second day of the Formula 1 official test session.
US President Barack Obama has pledged to "finish the job" and end the Afghan war, addressing the US public live from a military base in Afghanistan. He arrived on an unannounced visit to sign an agreement on future Afghan-US ties with President Hamid Karzai, ahead of a Nato summit.
A giraffe is pictured near lesser flamingos at Lake Oloidien near Naivasha in Kenya. The flamingos are currently in abundance in the country's drier regions after heavy rains nationwide have altered the salinity of the water in many lakes, making them less rich in phytoplankton, the flamingos' food, and forcing the birds to fly to drier areas.
Supporters of the Greek Communist party (KKE) listen to a pre-election speech by General Secretary Aleka Papariga in Athens ahead of the forthcoming general election on 6 May.
HMS Ocean, on deployment in the Thames as part of the Olympic security preparations, squeezed past the Thames Barrier as it made its way up the river.
British artist Julian Beever's pavement art was on show in Santiago, Chile.
Patty Russo and her husband Joe pray during a National Day of Prayer gathering in the rotunda at the Iowa Statehouse in Des Moines. Congress established the day of prayer in 1952, and in 1988 declared that it would be held every year on the first Thursday in May.