Supporters of the YES vote to the upcoming referendum hold a demonstration in front of the Greek Parliament in Athens, Tuesday, June 30, 2015.

Greece's last-minute overtures to international creditors for financial aid were not enough to save the country from becoming the first developed economy to default on a loan with the International Monetary Fund.

Privacy setting shortcuts are displayed on Apple Inc. iPhone 6 smartphone screen as a FaceBook Inc. logo is seen in this arranged photograph taken in London, U.K., on Friday, May, 15, 2015.

Facebook opens Johannesburg office as it looks to add to its existing 120M users on the continent.

The U.S. and Cuban flags are seen in the George C. Marshall Conference Center while representatives from the two nations meet at the U.S. State Department February 27, 2015 in Washington, D.C.

Countries mark major step in re-establishing diplomatic ties severed in 1961.

Officers evacuate casualties from the air force-owned aircraft that crashed in Medan, North Sumatra, Indonesia on June 30, 2015. An Indonesian air force Hercules C-130 plane with 12 crew aboard has crashed into a residential neighborhood in the country's third-largest city Medan.

Plane crashed into residential area, killing 122 aboard and 19 on ground.

Protesters chant slogans in front of the Greek parliament in central Athens, on June 29, 2015. Some 17,000 people took to the streets of Athens and Thessalonique to say 'No' to the latest offer of a bailout deal, accusing Greece's international creditors of blackmail.

Government mulling whether to accept an offer that would let Greece repay part of its debt.

Houthis (members of Ansarullah movement) gather around the site of a bomb attack which targeted a military hospital in the Ferai street of Sana'a, Yemen on June 30, 2015.

More than 1,000 fled, including al-Qaeda suspects.

Miami Children's Hospital pediatrician Dr. Amanda Porro, M.D administers a measles vaccination to Sophie Barquin,4, as her mother Gabrielle Barquin holds her during a visit to the Miami Children's Hospital on January 28, 2015 in Miami, Florida.

Requires most schoolchildren to be vaccinated against diseases including measles and whooping cough.