Detail of an incandescent light bulb in Athens, Greece August 7, 2017.

A general view shows apartment blocks in Kiev, Ukraine, August 5, 2017. Picture taken August 5, 2017.

Anti-Zuma protesters, civil society groups and faith communities march against President Zuma, in Cape Town, South Africa, August 7, 2017.

Image used for illustrative purposes. Temple of Poseidon is seen as a full moon is partially covered by the Earth's shadow during a lunar eclipse in Cape Sounion, east of Athens, Greece, August 7, 2017. REUTERS/Costas Baltas

Young Turkana tribeswomen sing in a village near Baragoy, Kenya August 6, 2017. Picture taken August 6, 2017.

Cricket - England vs South Africa - Fourth Test - Manchester, Britain - August 7, 2017 England's Joe Root and teammates celebrate winning the test series

African migrants react after crossing the border from Morocco to Spain's North African enclave of Ceuta, Spain, early August 7, 2017.

U.S. State Secretary Rex Tillerson, left, passes by the table of Chinese Foreign Minister Wang Yi at the start of the 7th East Asia Summit Foreign Ministers' Meeting and its dialogue partners as part of the 50th ASEAN Ministerial Meetings in Manila, Philippines August 7, 2017.

African migrants are detained by police as they are discovered hidden inside a travelling amusement park truck on their way to cross Spanish mainland city of Algeciras from Spain's North African enclave of Ceuta, Spain, August 7, 2017. REUTERS/Jesus Moron

A big wave caused by Typhoon Noru crashes on a breakwater in Aki, Kochi Prefecture, Japan in this photo taken by Kyodo on August 7, 2017.

Fans in Spider-Man costumes wait for the arrival of cast member Tom Holland and director Jon Watts during the Japan premiere of "Spider-Man: Homecoming" in Tokyo, Japan August 7, 2017.

South Korean ousted leader Park Geun-hye arrives at a court in Seoul, South Korea, August 7, 2017.

Kenyan Farmer Gerald Maina, holds a machete as he patrols the edge of the Rift Valley after a spate of attacks in Kamweje village in Laikipia County, Kenya, July 24, 2017. Picture taken July 24, 2017.