French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta TPX IMAGES OF THE DAY

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

A fire truck is seen during a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

A fire truck is seen during a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

Volonteers take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French police and firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

French firemen wearing chemical protective suits take part in a mock chemical attack exercise at the Geoffroy Guichard stadium in Saint-Etienne, France, April 4, 2016 in preparation of security measures for the UEFA 2016 European Championship. REUTERS/Robert Pratta 

Cast member Bryan Cranston, who played the character Walter White, touches his yellow Tyvek suit from the award-winning television series "Breaking Bad", during a donation of the show's memorabilia at the Smithsonian Museum of American History in Washington November 10, 2015. REUTERS/Gary Cameron

Series creator Vince Gilligan from the award-winning television series "Breaking Bad" waves near Tyvek suit memorabilia at the Smithsonian Museum of American History in Washington November 10, 2015. The show donated several artifacts from the series to the Smithsonian today. REUTERS/Gary Cameron

Cast member Bryan Cranston, who played the character Walter White in the award-winning television series "Breaking Bad", is introduced during a donation of the show's memorabilia at the Smithsonian Museum of American History in Washington November 10, 2015. Cranston wore the yellow Tyvek suit in the series. REUTERS/Gary Cameron

(L-R) Cast members Aaron Paul, series creator Vince Gilligan, Bryan Cranston, Jonathan Banks and RJ Mitte from the award-winning television series "Breaking Bad" stand by Tyvek suits and masks used in the series during a memorabilia donating event at the Smithsonian Museum of American History in Washington November 10, 2015. REUTERS/Gary Cameron

Migrants disembark from the German navy vessel Schleswig Holstein in the Sicilian harbour of Augusta, Italy July 23, 2015. Traditionally a nation of emigrants, Italy is now struggling to absorb a ceaseless influx of immigrants from Africa and the Middle East. Prime Minister Matteo Renzi is under pressure to stem the flow and his government is fighting to calm tensions. Migrant arrivals have already exceeded 85,000 this year, following 170,000 in all of 2014. While many of the newcomers look to move swiftly to wealthier northern Europe, some 85,000 are housed in Italian shelters - up from 60,000 last year. REUTERS/Antonio Parrinello 

Migrants disembark from the German navy vessel Schleswig Holstein in the Sicilian harbour of Augusta, Italy July 23, 2015. Traditionally a nation of emigrants, Italy is now struggling to absorb a ceaseless influx of immigrants from Africa and the Middle East. Prime Minister Matteo Renzi is under pressure to stem the flow and his government is fighting to calm tensions. Migrant arrivals have already exceeded 85,000 this year, following 170,000 in all of 2014. While many of the newcomers look to move swiftly to wealthier northern Europe, some 85,000 are housed in Italian shelters - up from 60,000 last year. REUTERS/Antonio Parrinello 

A child is helped to disembark from the German navy vessel Schleswig Holstein in the Sicilian harbour of Augusta, Italy July 23, 2015. Traditionally a nation of emigrants, Italy is now struggling to absorb a ceaseless influx of immigrants from Africa and the Middle East. Prime Minister Matteo Renzi is under pressure to stem the flow and his government is fighting to calm tensions. Migrant arrivals have already exceeded 85,000 this year, following 170,000 in all of 2014. While many of the newcomers look to move swiftly to wealthier northern Europe, some 85,000 are housed in Italian shelters - up from 60,000 last year. REUTERS/Antonio Parrinello TPX IMAGES OF THE DAY

Workers for special cleaning put garbage into a plastic bags at a garbage-filled flat in Tokyo March 20, 2015 where a body of 85 year-old man was left for over a month. In rapidly ageing Japan, more people are dying alone and unnoticed. Specialist clean-up crews are on hand to cleanse "lonely death" apartments once their passing is spotted, including placing incense and flowers. In March, the body of a man in his 80s was found on the floor of his apartment in Tokyo. He had been dead for a month. The family didn't visit and the only reason for the body's discovery was the slight smell that troubled the downstairs neighbour. In a country where around 5 million elderly people live alone, the number of decaying bodies found in empty homes is expected to soar. REUTERS/Toru Hanai

PICTURE 7 OF 21 FOR WIDER IMAGE STORY 'A LONELY DEATH'

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Hirotsugu Masuda, a worker for special cleaning, reacts as he enters a garbage-filled flat in Tokyo March 20, 2015 where a body of 85 year-old man was left over a month. In rapidly ageing Japan, more people are dying alone and unnoticed. Specialist clean-up crews are on hand to cleanse "lonely death" apartments once their passing is spotted, including placing incense and flowers. In March, the body of a man in his 80s was found on the floor of his apartment in Tokyo. He had been dead for a month. The family didn't visit and the only reason for the body's discovery was the slight smell that troubled the downstairs neighbour. In a country where around 5 million elderly people live alone, the number of decaying bodies found in empty homes is expected to soar. REUTERS/Toru Hanai

PICTURE 2 OF 21 FOR WIDER IMAGE STORY 'A LONELY DEATH'

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An Israeli Defence Force (IDF) reservist from the Home Front Command wearing a protective suit takes a decontamination shower during an exercise, together with hospital staff, simulating a chemical warfare attack at the Wolfson Hospital in Holon near Tel Aviv March 26, 2015. REUTERS/Baz Ratner

An Israeli Defence Force (IDF) reservist from the Home Front Command wears a protective suit during an exercise, together with hospital staff, simulating a chemical warfare attack at the Wolfson Hospital in Holon near Tel Aviv March 26, 2015. REUTERS/Baz Ratner
TPX IMAGES OF THE DAY TPX IMAGES OF THE DAY

Health officers in full protective gear wait to cross a road near a wholesale poultry market in Hong Kong December 31, 2014. Hong Kong began culling 15,000 chickens on Wednesday and suspended imports of live poultry from mainland China for 21 days after the H7 bird flu strain was discovered in a batch of live chickens that came from the southern province of Guangdong. REUTERS/Tyrone Siu (CHINA - Tags: HEALTH FOOD AGRICULTURE ANIMALS POLITICS TPX IMAGES OF THE DAY) 

A worker adjusts her gloves as she learns to put on her protective suit during an Ebola training session held by Spain's Red Cross in Madrid October 29, 2014. The Spanish Red Cross is training doctors, nurses and engineers to fight Ebola in Western Africa during a two day pre-deployment course at a mock field hospital resembling the Ebola treatment center the organization has in Kenema, Sierra Leone. REUTERS/Susana Vera (SPAIN - Tags: HEALTH SOCIETY TPX IMAGES OF THE DAY) 

An emergency worker wears a hazmat suit during a mock "crisis response" exercise in Toronto, October 26, 2014. Scores of police, firefighters and other emergency workers surrounded an office tower in downtown Toronto's deserted financial district on Sunday for a disaster-response drill, following a week that saw two soldiers killed on Canadian soil. Security in normally relaxed Canada has been tighter in the days since a gunman shot dead a soldier in Ottawa before charging into the parliament building and another man ran over two soldiers with a car, killing one, outside Montreal. REUTERS/Mark Blinch (CANADA - Tags: SOCIETY MILITARY) 

A U.S. Army soldier with the 615th Engineer Company, 52nd Engineer Battalion pulls his protective suit over his head during their final session of personal protective equipment training at Ft. Carson in Colorado Springs, Colorado October 23, 2014. The engineers were getting their final training prior to being deployed to Africa as part of the U.S. military's response to the Ebola crisis. REUTERS/Rick Wilking (UNITED STATES - Tags: HEALTH DISASTER MILITARY POLITICS) 

Health workers carry the body of an Ebola virus victim in the Waterloo district of Freetown, October 21, 2014. Authorities in Sierra Leone imposed a curfew in the eastern town of Koidu on Tuesday after a dispute between youth and police over a suspected case of Ebola degenerated into gunfire and rioting, officials said. Picture taken October 21, 2014. REUTERS/Josephus Olu-Mamma (SIERRA LEONE - Tags: CIVIL UNREST DISASTER POLITICS HEALTH TPX IMAGES OF THE DAY) 

Protestor Jeff Hulbert of Annapolis, Maryland holds a sign reading "Stop the Flights" as he demonstrates in favor of a travel ban to stop the spread of the Ebola virus, in front of the White House in Washington October 16, 2014. REUTERS/Jim Bourg (UNITED STATES - Tags: POLITICS HEALTH CIVIL UNREST TPX IMAGES OF THE DAY) 

A member of the CG Environmental HazMat team disinfects the entrance to the residence of a health worker at the Texas Health Presbyterian Hospital who has contracted Ebola in Dallas, Texas, October 12, 2014. The infected worker, identified as a woman but not named by authorities as they announced the case on Sunday, is believed to be the first person to contract the disease in the United States. REUTERS/Jaime R. Carrero (UNITED STATES - Tags: DISASTER HEALTH) 

Neighboring people watch a man in a hazardous material suit work on cleaning the apartment unit where a man diagnosed with the Ebola virus was staying in Dallas, Texas, October 6, 2014. Thomas Eric Duncan, the first person to develop Ebola in the United States, was struggling to survive at a Dallas hospital heightening concerns of the worst Ebola epidemic on record and has killed more than 3,400 people. REUTERS/Jim Young (UNITED STATES - Tags: DISASTER HEALTH SOCIETY) 

A worker in a hazardous material suit looks out from the apartment unit where a man diagnosed with the Ebola virus was staying in Dallas, Texas, October 5, 2014. Thomas Eric Duncan, the first person diagnosed with Ebola in the United States, was fighting for his life at a Dallas hospital on Sunday and appeared not to be receiving any of the experimental medicines for the virus, a top U.S. medical official said. REUTERS/Jim Young (UNITED STATES - Tags: HEALTH) 

Health workers spray bleach solution on a woman suspected of having contracted the Ebola virus in Monrovia, Liberia, September 15, 2014. Airlines have halted many flights into and around West Africa, where governments have closed some borders and imposed travel restrictions in a bid to fight an Ebola outbreak that has killed over 2,400 people. REUTERS/James Giahyue (LIBERIA - Tags: HEALTH DISASTER) 

Members of a delegation of senior officials from China take part in a chemical warfare drill in Shaare Zedek Medical Center in Jerusalem September 15, 2014. Some 20 Chinese officials took part in the drill, part of a disaster management workshop organised by the Emergency Medicine department at Ben Gurion University. This is the first of many such workshops planned for the coming years, a statement from the university said. REUTERS/Ronen Zvulun (JERUSALEM - Tags: POLITICS HEALTH TPX IMAGES OF THE DAY) 

Medicins Sans Frontieres (MSF) health workers prepare at ELWA's hospital isolation camp during the visit of Senior United Nations (U.N.) System Coordinator for Ebola, David Nabarro, in Monrovia August 23, 2014. As the outbreak has spread across borders from its initial epicentre in Guinea, governments in the region have introduced increasingly strict travel restrictions. Ivory Coast has closed its land borders Guinea and Liberia to try to prevent the virus from crossing onto its territory, the government announced late on Friday. REUTERS/2Tango (LIBERIA - Tags: HEALTH SOCIETY DISASTER) 

A fire brigade paramedic is assisted while putting on a sealed protective suit during a drill for the crew of a special ambulance, in Frankfurt August 21, 2014. The special ambulance is equipped to treat patients suffering from ebola and other highly infectious diseases. Ebola is one of the deadliest diseases known to humanity. It has no proven cure and there is no vaccine to prevent infection. The rigorous use of quarantine is needed to prevent its spread, as well as high standards of hygiene for anyone who might come into contact with the disease. REUTERS/Kai Pfaffenbach (GERMANY - Tags: HEALTH) 

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY OR DEATH

Health workers wearing protective clothing prepare to carry an abandoned dead body presenting with Ebola symptoms at Duwala market in Monrovia August 17, 2014. To try to control the Ebola epidemic spreading through West Africa, Liberia has quarantined remote villages at the epicentre of the virus, evoking the "plague villages" of medieval Europe that were shut off from the outside world. REUTERS/2Tango (LIBERIA - Tags: HEALTH DISASTER TPX IMAGES OF THE DAY) 

Ward physician Thomas Klotzkowski wears a protective suit at the quarantine station for patients with infectious diseases at the Charite hospital in Berlin August 11, 2014. The isolation ward at the Charite is one of several centres in Germany equipped to treat patients suffering from ebola and other highly infectious diseases, the clinic's doctor for tropical medicine Florian Steiner said. Ebola is one of the deadliest diseases known to humanity. It has no proven cure and there is no vaccine to prevent infection. The most effective treatment involves alleviating symptoms that include fever, vomiting and diarrhoea. The rigorous use of quarantine is needed to prevent its spread, as well as high standards of hygiene for anyone who might come into contact with the disease. The sign reads: "Do not Enter. Infectious Diseases. No Trespassing!" REUTERS/Thomas Peter (GERMANY - Tags: HEALTH) 

Protective suits hang in the quarantine station for patients with infectious diseases at the Charite hospital in Berlin August 11, 2014. The isolation ward at the Charite is one of several centres in Germany equipped to treat patients suffering from ebola and other highly infectious diseases, the clinic's doctor for tropical medicine Florian Steiner said. Ebola is one of the deadliest diseases known to humanity. It has no proven cure and there is no vaccine to prevent infection. The most effective treatment involves alleviating symptoms that include fever, vomiting and diarrhoea. The rigorous use of quarantine is needed to prevent its spread, as well as high standards of hygiene for anyone who might come into contact with the disease. The sign reads: "Do not Enter. Infectious Diseases. No Trespassing!" REUTERS/Thomas Peter (GERMANY) 

Ward physician Thomas Klotzkowski (R) cleans doctor for tropical medicine, Florian Steiner, in a disinfection chamber at the quarantine station for patients with infectious diseases at the Charite hospital in Berlin August 11, 2014. The isolation ward at the Charite is one of several centres in Germany equipped to treat patients suffering from ebola and other highly infectious diseases, the clinic's doctor for tropical medicine Florian Steiner said. Ebola is one of the deadliest diseases known to humanity. It has no proven cure and there is no vaccine to prevent infection. The most effective treatment involves alleviating symptoms that include fever, vomiting and diarrhoea. The rigorous use of quarantine is needed to prevent its spread, as well as high standards of hygiene for anyone who might come into contact with the disease. REUTERS/Thomas Peter (GERMANY - Tags: HEALTH) 

Doctor for tropical medicine Florian Steiner wears a protective suit as looks through a microscope at the quarantine station for patients with infectious diseases at the Charite hospital in Berlin August 11, 2014. The isolation ward at the Charite is one of several centres in Germany equipped to treat patients suffering from ebola and other highly infectious diseases, the clinic's doctor for tropical medicine Florian Steiner said. Ebola is one of the deadliest diseases known to humanity. It has no proven cure and there is no vaccine to prevent infection. The most effective treatment involves alleviating symptoms that include fever, vomiting and diarrhoea. The rigorous use of quarantine is needed to prevent its spread, as well as high standards of hygiene for anyone who might come into contact with the disease.REUTERS/Thomas Peter (GERMANY - Tags: HEALTH) 

A Czech military personnel wearing protective gear takes part in a drill in the Biological Defence Centre, a specialised medical institution ensuring complete biological defence, in the village of Techonin August 11, 2014. The Biological Defence Department is involved in the NATO biological defence system and is equipped for treatment of possible Ebola virus patients. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: MILITARY HEALTH SCIENCE TECHNOLOGY) 

A Czech military personnel wearing protective gear takes part in a drill with a dummy in the Biological Defence Centre, a specialised medical institution ensuring complete biological defence, in the village of Techonin August 11, 2014. The Biological Defence Department is involved in the NATO biological defence system and is equipped for treatment of possible Ebola virus patients. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: MILITARY HEALTH SCIENCE TECHNOLOGY) 

A Czech military personnel wearing protective gear takes part in a drill with a dummy in the Biological Defence Centre, a specialised medical institution ensuring complete biological defence, in the village of Techonin August 11, 2014. The Biological Defence Department is involved in the NATO biological defence system and is equipped for treatment of possible Ebola virus patients. REUTERS/David W Cerny (CZECH REPUBLIC - Tags: MILITARY HEALTH SCIENCE TECHNOLOGY)