People look at a screen displaying a ZTE mobile phone with a Firefox logo on its screen during a press conference to present the new Firefox OS mobile operating system in Barcelona on February 24, 2013, a day before the start of the 2013 Mobile World Congress. The 2013 Mobile World Congress, the world's biggest mobile fair, is held from February 25 to February 28 in Barcelona. AFP PHOTO / JOSEP LAGO
Credit: JOSEP LAGO
A banner supporting the NO vote in the upcoming referendum hangs from the offices of the Greek Finance Ministry on July 1, 2015 in Athens, Greece. Earlier today Greek Prime Minister Alexis Tsirpas vowed to push on with his plan for a referendum this Sunday on the recent proposals from the country's creditors.
Credit: Christopher Furlong
Prince Charles. Prince of Wales, Patron of the Combined Operations Pilotage Parties Memorial Fund (COPP), greets veterans after laying a wreath during a visit to commemorate the COPP memorial on July 1, 2015 on Hayling Island in Hampshire, United Kingdom.
Credit: WPA Pool
Journalists make photographs of a sign that encourages visitors to make pictures during White House tours July 1, 2015 in Washington, DC. Wednesday's lifting of the 40-year-old ban on photography during White House tours allows small cameras to be used and comes with its own social media hashtag, #WhiteHouseTour.
Credit: Chip Somodevilla
Female circus students practice for a performance on July 1, 2015 at Phare Ponleu Salpak in Battambang, Cambodia. Phare Ponleu Salpak is an organization providing free education and artistic training to Cambodian children. Students in the organization's circus program often go on to careers performing both internationally and domestically at venues like Phare - The Cambodian Circus in Siem Reap.
Credit: Taylor Weidman
In this handout photo provided by the Greek Prime Minister's Office, Greek Prime Minister Alexis Tsirpas delivers a televised address to the nation from his office at Maximos Mansion on July 1, 2015 in Athens, Greece. Mr Tsipras has vowed to push on with his plan for a referendum this Sunday on the recent proposals from the country's creditors.
Incoming U.S. Navy plebes, or freshmen, are taught how to salute on their first day at the U.S. Naval Academy July 1, 2015 in Annapolis, Maryland. Over 1,193 Plebes will be processed through various stations that will culminate with the Oath of Office ceremony to become members of the Naval Academy's Class of 2019.