Mass lightning bolts light up night skies by the Daggett airport from monsoon storms passing over the high deserts early Wednesday, north of Barstow, California July 1, 2015. Picture taken using long exposure

Gene Blevins/Reuters

Mass lightning bolts light up night skies by the Daggett airport from monsoon storms passing over the high deserts early Wednesday, north of Barstow, California

A cleaner works on Centre Court ahead of play on day three at Wimbledon on July 1, 2015 in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks from Monday 29th June

Carl Court/Getty Images

A cleaner works on Centre Court ahead of play on day three at Wimbledon on Wednesday in London, England

An elementary school student walks past next to a rice paddy field in Kazo, north of Tokyo on Wednesday.

Issei Kato/Reuters

An elementary school student walks past next to a rice paddy field in Kazo, north of Tokyo on Wednesday

Protesters march during a rally in Hong Kong, China, on Wednesday, July 1, 2015. Organizers of the annual protest marking Hong Kong's return to Chinese rule face new challenges this year after the 79-day Occupy movement failed to force China to the bargaining table

Lam Yik Fei/Bloomberg

Protesters march during a rally in Hong Kong, China, on Wednesday

Holidaymakers react as people lay flowers on Marhaba beach, where 38 people were killed in a terrorist attack last Friday, on June 30, 2015 in Sousse, Tunisia. British police have been deployed to the area as part of one of the biggest counter terror operations since the London bombings on July 7, 2005

Jeff J Mitchell/Getty Images

Holidaymakers react as people lay flowers on Marhaba beach, where 38 people were killed in a terrorist attack last Friday, on Tuesday in Sousse, Tunisia

Members of the emergency services take part in Exercise Strong Tower outside the disused Aldywch tube station on Surrey Street onTuesday in London, England.  The counter-terrorism training exercise will involve as many as 1,000 officers and will take place across the city until Wednesday afternoon

Rob Stothard/Getty Images

Members of the emergency services take part in Exercise Strong Tower outside the disused Aldywch tube station on Surrey Street on Tuesday in London, England

Municipal workers examine the bottom of the Kura River after water was released from the dam in downtown Tbilisi, Georgia on Tuesday, June 30, 2015. Recent flooding, triggered by torrential rains, killed at least 19 people, destroyed houses and tore up roads. Six people remain missing

Shakh Aivazov/AP

Municipal workers examine the bottom of the Kura River after water was released from the dam in downtown Tbilisi, Georgia on Tuesday. Recent flooding, triggered by torrential rains, killed at least 19 people, destroyed houses and tore up roads

A young boy walks between fountains, in Nice, southeastern France, Tuesday, June 30, 2015. Temperatures in the area rose to 30 degrees Celsius (86 Fahrenheit)

Lionel Cironneau/AP

A young boy walks between fountains, in Nice, southeastern France, Tuesday. Temperatures in the area rose to 30 degrees Celsius (86 Fahrenheit)

An armed member of Houthi Group inspects the scene of a car bomb targeting a group of female mourners loyal to Shia Houthi Group in Sanaa, Yemen on Tuesday

Yahya Arhab/EPA

An armed member of Houthi Group inspects the scene of a car bomb targeting a group of female mourners loyal to Shia Houthi Group in Sanaa, Yemen on Tuesday

An Afghan policeman reacts at the site of a suicide bomb attack in Kabul, Afghanistan June on Tuesday. A suicide bomber attacked a convoy of foreign troops serving with NATO on the main road running between Kabul's airport and the U.S. embassy

Ahmad Masood/Reuters

An Afghan policeman reacts at the site of a suicide bomb attack in Kabul, Afghanistan June on Tuesday. A suicide bomber attacked a convoy of foreign troops serving with NATO on the main road running between Kabul’s airport and the U.S. embassy

A member of ground staff updates a fixtures board on day two of Wimbledon tennis tournament on June 30, 2015 in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks from Monday 29th June

Carl Court/Getty Images

A member of ground staff updates a fixtures board on day two of Wimbledon tennis tournament on Tuesday in London, England. The 129th tournament to be hosted at Wimbledon is due to run for two weeks

Armed guards patrol Marhaba beach at the scene where 38 people were killed  last Friday, on Monday, Sousse, Tunisia

Jeff J Mitchell/Getty Images

Armed guards patrol Marhaba beach at the scene where 38 people were killed last Friday, on Monday, Sousse, Tunisia

Serena Williams of U.S.A. reacts during her match against Margarita Gasparyan of Russia at the Wimbledon Tennis Championships in London...Serena Williams of U.S.A. reacts during her match against Margarita Gasparyan of Russia at the Wimbledon Tennis Championships in London, June 29, 2015

Toby Melville/Reuters

Serena Williams of U.S.A. reacts during her match against Margarita Gasparyan of Russia at the Wimbledon Tennis Championships in London on Monday

A member of the Kurdish security service sits next to the rubble of the security service headquarters in the northeastern Syrian city of Hasakeh on June 28, 2015, days after Islamic State (IS) group targeted the building with an explosive-rigged vehicle. IS seized two neighbourhoods in southern Hasakeh last week in a new attempt to seize the provincial capital, causing tens of thousands of people to flee, according to the United Nations

Delil Souleiman/AFP

A member of the Kurdish security service sits next to the rubble of the security service headquarters in the northeastern Syrian city of Hasakeh, days after Islamic State (IS) group targeted the building with an explosive-rigged vehicle

A woman walks through an alley as used pairs of jeans are hung to dry before they are sold in a second-hand clothes market in Kolkata, India, June 29, 2015

Rupak De Chowdhuri/Reuters

A woman walks through an alley as used pairs of jeans are hung to dry before they are sold in a second-hand clothes market in Kolkata, India on Monday

Revellers walk through rubbish left in front of the Pyramid Stage as they leave Worthy Farm in Somerset after the Glastonbury Festival in Britain June 29, 2015

Dylan Martinez/Reuters

Revellers walk through rubbish left in front of the Pyramid Stage as they leave Worthy Farm in Somerset after the Glastonbury Festival in Britain on Monday

South Korean marines aim their machine guns after they landed on the beach during a landing exercise in Taean, South Korea, Monday, June 29, 2015. South Korean navy and marine held a joint landing drill on the west coast on Monday improving their military readiness to protect the Korean Peninsula

Ahn Young-joon/AP

South Korean marines aim their machine guns after they landed on the beach during a landing exercise in Taean, South Korea on Monday. South Korean navy and marine held a joint landing drill on the west coast on Monday improving their military readiness to protect the Korean Peninsula

Fans scream for James Bay as he performs on the Pyramid stage at the Glastonbury Festival, at Worthy Farm in Somerset

Ben Birchall/PA

Fans scream for James Bay as he performs on the Pyramid stage at the Glastonbury Festival, at Worthy Farm in Somerset

An Indian boy walks by the Arabian Sea coast piled with garbage, mostly plastic waste, in Mumbai, India, Friday, June 26, 2015. Several recent reports have highlighted India s worsening air quality and termed its capital New Delhi the worst polluted city in the country. In the last decade, along with India's economic boom and increasing prosperity, the output of garbage has also increased manifold

Rajanish Kakade/AP

An Indian boy walks by the Arabian Sea coast piled with garbage, mostly plastic waste, in Mumbai, India on Frida

Kurdish women wave to their relatives who wait near fence on the Syrian side in Suruc in Turkey's Sanliurfa province  on June 26, 2015. At least 120 civilians have been killed by the Islamic State group since it entered the Syrian Kurdish town of Kobane, also known as Ain al-Arab, just over 24 hours ago, a monitoring group said

Bulent Kilic/AFP

Kurdish women wave to their relatives who wait near fence on the Syrian side in Suruc in Turkey’s Sanliurfa province on Friday