The logos of the International Federation of Red Cross and Red Crescent Societies are seen in boxes at the warehouse of Venezuelan Red Cross, where international humanitarian aid for Venezuela is being stored, in Caracas, Venezuela, April 22, 2019. REUTERS/Ueslei Marcelino 

The logos of Unicef and of the International Federation of Red Cross and Red Crescent Societies, are seen in boxes at the warehouse of Venezuelan Red Cross, where international humanitarian aid for Venezuela is being stored, in Caracas, Venezuela, April 22, 2019. REUTERS/Ueslei Marcelino 

The logos of the International Federation of Red Cross and Red Crescent Societies are seen in boxes at the warehouse of Venezuelan Red Cross, where international humanitarian aid for Venezuela is being stored, in Caracas, Venezuela, April 22, 2019. REUTERS/Ueslei Marcelino 

The logos of the International Federation of Red Cross and Red Crescent Societies are seen in boxes at the warehouse of Venezuelan Red Cross, where international humanitarian aid for Venezuela is being stored, in Caracas, Venezuela, April 22, 2019. REUTERS/Ueslei Marcelino 

The logos of the International Federation of Red Cross and Red Crescent Societies are seen at a warehouse of Venezuelan Red Cross, where international humanitarian aid for Venezuela is being stored, in Caracas, Venezuela, April 22, 2019. REUTERS/Ueslei Marcelino 

Workers of Venezuelan Red Cross stand next to trucks with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

A worker of Venezuelan Red Cross walks past a truck with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

A worker of Venezuelan Red Cross walks along trucks with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

A worker of Venezuelan Red Cross walks along trucks with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

A worker of Venezuelan Red Cross walks along trucks with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

Trucks with logo of the International Federation of Red Cross and Red Crescent Societies (IFRC) carrying humanitarian aid, arrive at a warehouse where the aid will be stored, in Caracas, Venezuela, April 16, 2019. REUTERS/Carlos Garcia Rawlins 

Farmer Don Rief, talks with USDA Under Secretary Bill Northey about the flood damage to his farm in Crescent, Iowa, U.S., March 29, 2019. Photo taken March 29, 2019. REUTERS/Tom Polansek 

The contents of a grain silo which burst from flood damage is shown in Crescent, Iowa, U.S., March 29, 2019. Photo taken March 29, 2019. REUTERS/Tom Polansek 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela Mach 29, 2019. REUTERS/Ivan Alvarado 

Uighur children of Abdulaziz Abdulvahid play at the entrance to their home in Kayseri, Turkey, January 31, 2019. Abdulvahid, a 39-year-old Uighur man who has health problems and survives on Red Crescent aid, and his children, have spent most of their lives in Kayseri. Two of children remain in Xinjiang, and he has not been in contact with them or any other family members since 2013. "I spent all my money to come to Turkey. I can't work because of a serious back problem. We are in need of help to survive," said Abdulvahid. REUTERS/Murad Sezer SEARCH "SEZER NOURMUHAMMED" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Abdulaziz Abdulvahid, a 39-year-old Uighur man who has health problems and survives on Red Crescent aid, poses with his wife and seven children at their home in Kayseri, Turkey, January 31, 2019. Two of Abdulvahid's children remain in Xinjiang, and he has not been in contact with them or any other family members since 2013. "I spent all my money to come to Turkey. I can't work because of a serious back problem. We are in need of help to survive," said Abdulvahid. REUTERS/Murad Sezer SEARCH "SEZER NOURMUHAMMED" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A bird sits on a crescent on a mosque in Minsk, Belarus March 21, 2019. REUTERS/Vasily Fedosenko 

Waxing Crescent is seen next to the cross of the Orthodox church on the eve of Great Lent, near the town of Ust-Kut in Irkutsk region of Russia, March 10, 2019. REUTERS/Vasily Fedosenko 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), attends a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Francesco Rocca, President of the International Federation of Red Cross and Red Crescent Societies (IFRC), talks to the media during a news conference in Caracas, Venezuela February 8, 2019. REUTERS/Carlos Garcia Rawlins 

Yemeni Red Crescent staffers carry Saudi prisoner Moussa Awaji from a bus to board an ICRC plane at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffers help Saudi prisoner Moussa Awaji as he waits for an ICRC plane at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Saudi prisoner Moussa Awaji is accompanied by Yemeni Red Crescent staffers as he waits for an ICRC plane at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffer stands by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffer stands by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffer stands by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffers stand by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffer stands by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

Yemeni Red Crescent staffers stand by Saudi prisoner Moussa Awaji at the Sanaa airport after he was released by the Houthis in Sanaa, Yemen January 29, 2019. REUTERS/Khaled Abdullah 

A crescent moon is seen behind a statue of former British Prime Minister Winston Churchill outside the Houses of Parliament in London, Britain, January 14, 2019. REUTERS/Clodagh Kilcoyne 

A Waxing Crescent moon is seen at dusk, Harpenden, Britain, November 14, 2018. REUTERS/Peter Cziborra 

A Waxing Crescent moon is seen at dusk as a plane flies by, Harpenden, Britain, November 14, 2018. REUTERS/Peter Cziborra 

A Waxing Crescent moon is seen at dusk, Harpenden, Britain, November 14, 2018. REUTERS/Peter Cziborra 

The moon is pictured beside a tree in Berlin, Germany, November 14, 2018. REUTERS/Fabrizio Bensch 

A Wizz Air passenger airplane flies past a Waxing Crescent moon, Harpenden, Britain, September 16, 2018. REUTERS/Peter Cziborra 

A crescent moon is seen behind the Memorial Church (Gedaechtniskirche) in Berlin, Germany, August 15, 2018. REUTERS/Fabrizio Bensch 

A crescent moon is seen behind the tower of the protestant church on the Hohenzollernplatz square in Berlin, Germany, August 15, 2018. REUTERS/Fabrizio Bensch 

A crescent moon is seen behind the Memorial Church (Gedaechtniskirche) in Berlin, Germany, August 15, 2018. REUTERS/Fabrizio Bensch 

A crescent moon is seen behind the Memorial Church (Gedaechtniskirche) in Berlin, Germany, August 15, 2018. REUTERS/Fabrizio Bensch 

A crescent moon is seen behind the Memorial Church (Gedaechtniskirche) in Berlin, Germany, August 15, 2018. REUTERS/Fabrizio Bensch 

A plane leaves behind contrails as it flies past a waxing crescent moon, Portsmouth, Britain, August 14, 2018. REUTERS/Peter Cziborra 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Britain's Prime Minister Theresa May talks with people from the Belfast Youth Forum during her visit to the Crescent Arts Centre in Belfast, Northern Ireland, July 20, 2018. Paul Faith/Pool via Reuters 

Gipfeli croissants are seen at A-2 motorway station near Erstfeld, Switzerland July 19, 2018. REUTERS/Arnd Wiegmann 

Croissants are seen at the breakfast buffet of an IBIS hotel in Moscow, Russia July 15, 2018. .REUTERS/ Kai Pfaffenbach 

A volunteer of Bangladesh Red Crescent Society Bangladesh walks in the rain to call for the Rohingya refugees who have missing relatives in Myanmar or other countries, in Kutupalong camp in Cox's Bazar, Bangladesh July 4, 2018. Picture taken July 4, 2018. REUTERS/Mohammad Ponir Hossain TPX IMAGES OF THE DAY