French President Emmanuel Macron and former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attend a ceremony in memory of marines and the famed Kieffer commandos who took part to D-Day landings, in Colleville-Montgomery, as part of the 75th anniversary of the D-Day, France, June 6, 2019. REUTERS/Christian Hartmann 

Captain David Cole, bandmaster of the British Legion Band, talks to Camilla, Duchess of Cornwall as she meets veterans at a reception at Bayeux, France June 6, 2019. Arthur Edwards/Pool via REUTERS 

The green beret of former member of French Captain Philippe Kieffer's commando Leon Gautier, 96 years old, is seen as he attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Former member of French Captain Philippe Kieffer's green berets commando Leon Gautier, 96 years old, adjusts his beret as he attends an interview with Reuters in Ouistreham, France, May 13, 2019. Picture taken May 13, 2019. REUTERS/Christian Hartmann 

Captain of the Royal Australian Navy's Adelaide class guided missile frigate HMAS Melbourne (III) Marcus Buttler gestures as his warship arrives at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee 

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara speaks to the media upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee 

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara is greeted upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee 

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara speaks to the media upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee 

Captain of the Indian navy commissioned warship INS Kolkata Aditya Hara is greeted upon his warship arrival at Qingdao Port for the 70th anniversary celebrations of the founding of the Chinese People's Liberation Army Navy (PLAN), in Qingdao, China April 21, 2019. REUTERS/Jason Lee 

Former Deputy Defense Minister and former Vietnam War pilot Lieutenant General Tran Hanh sits next to his wife Captain Le Thi Xuyen and shows a May 1994 archive photo of late North Korean Kim Il Sung (C, front), late Vietnamese Defence Minister General Doan Khue (4th L, front) and himself (R, front) standing with Vietnamese military delegation, at his home in Hanoi, Vietnam February 14, 2019. Picture taken February 14, 2019. REUTERS/Kham 

Sri Lankan Army Commander General Mahesh Senanayake (3rd L) and MINUSMA Force Commander Lieutenant General Dennis Gyllensporre (L) salute as Sri Lankan army officers carry one of the two caskets of Sri Lankan UN Peacekeepers Captain H.W.D Jayawickrama and Corporal S.S Wijekumara, who were were killed when their convoy came under an Improvised Explosive Device attack in Mali, at the parade during the handover ceremony at Bandaranaike International Airport, in Katunayake, Sri Lanka February 4, 2019. REUTERS/Dinuka Liyanawatte 

A man cleans the carpet as two caskets of two Sri Lankan UN Peacekeepers Captain H.W.D Jayawickrama and Corporal S.S Wijekumara who were were killed when their convoy came under an Improvised Explosive Device attack in Mali, are seen before the handover ceremony at Bandaranaike International Airport, in Katunayake, Sri Lanka February 4, 2019. REUTERS/Dinuka Liyanawatte 

Sri Lankan army officers carry one of the two caskets of Sri Lankan UN Peacekeepers Captain H.W.D Jayawickrama and Corporal S.S Wijekumara, who were killed when their convoy came under an Improvised Explosive Device attack in Mali, at the parade during the handover ceremony at Bandaranaike International Airport in Katunayake, Sri Lanka February 4, 2019. REUTERS/Dinuka Liyanawatte 

Sri Lankan army officers carry one of the two caskets of Sri Lankan UN Peacekeepers Captain H.W.D Jayawickrama and Corporal S.S Wijekumara, who were killed when their convoy came under an Improvised Explosive Device attack in Mali, at the parade during the handover ceremony at Bandaranaike International Airport in Katunayake, Sri Lanka February 4, 2019. REUTERS/Dinuka Liyanawatte 

Sri Lankan army officers carry one of the two caskets of Sri Lankan UN Peacekeepers Captain H.W.D Jayawickrama and Corporal S.S Wijekumara, who were killed when their convoy came under an Improvised Explosive Device attack in Mali, at the parade during the handover ceremony at Bandaranaike International Airport in Katunayake, Sri Lanka February 4, 2019. REUTERS/Dinuka Liyanawatte 

Captain Adnan Abu Faisal, head of Syrian opposition's Manbij Military Council in exile, is pictured in Kafr Jana village, north of Afrin, Syria December 31, 2018. Picture taken December 31, 2018. REUTERS/Khalil Ashawi 

A U.S sailor cleans the main windscreen of the captain's bridge onboard the USS John C. Stennis as it makes its way to the Gulf through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed TPX IMAGES OF THE DAY 

A U.S sailor cleans the main windscreen of the captain's bridge onboard the USS John C. Stennis as it makes its way to the Gulf through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed TPX IMAGES OF THE DAY 

A U.S sailor keeps watch from the captain's bridge onboard the USS John C. Stennis as it makes its way to the Gulf through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed 

A U.S sailor keeps watch from the captain's bridge onboard the USS John C. Stennis as it makes its way to the Gulf through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed 

A U.S sailor cleans the main windscreen of the captain's bridge onboard the USS John C. Stennis as it makes its way to the Gulf through the Strait of Hormuz, December 21, 2018. REUTERS/Hamad I Mohammed 

Britain's Prince Harry is introduced to descendants of two England captains who died in the First World War, Jack Davis (with his grandfather Richard Slocock) who is the great, great grandson of Lancelot Slocock, and Max Garnett (with his father James) who is the great, great nephew of Ronnie Poulton, before the England v New Zealand rugby match at Twickenham Stadium, in London, Britain November 10, 2018. REUTERS/Dylan Martinez/Pool 

Britain's Prince Harry talks with Lewis Moody, former captain of English national rugby union team before the England v New Zealand rugby match at Twickenham Stadium, in London, Britain November 10, 2018. REUTERS/Dylan Martinez/Pool 

German navy Captain Sven Beck poses for a picture in Turku, Finland October 26, 2018. REUTERS/Sabine Siebold 

German navy Captain Sven Beck poses for a picture in Turku, Finland October 26, 2018. REUTERS/Sabine Siebold 

German navy Captain Sven Beck poses for a picture in Turku, Finland October 26, 2018. REUTERS/Sabine Siebold 

Brazil's far-right presidential candidate Jair Bolsonaro, a former Army captain, has surrounded himself with retired military generals. These ex-soldiers are key advisors and will serve in his cabinet if he is elected. 

U.S. President Donald Trump poses with Coach Jeff Monken (L) and team captains John Voit and Ahmad Bradshaw, with a gift for the president from the team, during the ceremony wherein Trump presented the Commander-in-Chief's Trophy to the U.S. Military Academy football team in the Rose Garden at the White House in Washington, U.S., May 1, 2018. REUTERS/Leah Millis 

French President Emmanuel Macron (2ndR), his personal military Chief of Staff, Admiral Bernard Rogel (L), the Chief of the Defense Staff of the French Army, General Francois Lecointre (2ndL) listen to Jean Porcher, ship's Captain of the Dixmude, docked in the French Navy base of Toulon, southern France, after delivering a speech to present his New Year's wishes to the French Army, January 19, 2018. REUTERS/Claude Paris/Pool 

First Captain of West Point's Corps of Cadets presents Former U.S. President George W. Bush with a Cadets' Sword as he is honored with the Sylvanus Thayer Award at the United States Military Academy in West Point, New York, U.S., October 19, 2017. REUTERS/Brendan McDermid TPX IMAGES OF THE DAY 

First Captain of West Point's Corps of Cadets presents Former U.S. President George W. Bush with a Cadets' Sword as he is honored with the Sylvanus Thayer Award at the United States Military Academy in West Point, New York, U.S., October 19, 2017. REUTERS/Brendan McDermid 

First Captain of West Point's Corps of Cadets presents Former U.S. President George W. Bush with a Cadets' Sword as he is honored with the Sylvanus Thayer Award at the United States Military Academy in West Point, New York, U.S., October 19, 2017. REUTERS/Brendan McDermid 

First Captain of West Point's Corps of Cadets presents Former U.S. President George W. Bush with a Cadets' Sword as he is honored with the Sylvanus Thayer Award at the United States Military Academy in West Point, New York, U.S., October 19, 2017. REUTERS/Brendan McDermid 

U.S. Army Captain Murzban Morris of the Department of Defense Joint Staff (R) addresses next to U.S. Ambassador Robert Wood about the North Korea's threat during the Conference on Disarmament at the United Nations Office in Geneva, Switzerland August 30, 2017. REUTERS/Denis Balibouse 

A slide showing the U.S. response to North Korea's threat is pictured during the presentation by U.S. Army Captain Murzban Morris of the Departement of Defense Joint Staff at the Conference on Disarmament at the United Nations Office in Geneva, Switzerland August 30, 2017. REUTERS/Denis Balibouse 

U.S. Ambassador Robert Wood (R) talks with U.S. Army Captain Murzban Morris of the Departement of Defense Joint Staff before their address on North Korea to the Conference on Disarmament at the United Nations Office in Geneva, Switzerland August 30, 2017. REUTERS/Denis Balibouse 

U.S. Ambassador Robert Wood (R) waits next to U.S. Army Captain Murzban Morris of the Departement of Defense Joint Staff before their address on North Korea to the Conference on Disarmament at the United Nations Office in Geneva, Switzerland August 30, 2017. REUTERS/Denis Balibouse 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto (rear R) of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

A soldier stands on duty after Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia's Canadian Light Infantry (PPCLI), makes history as she becomes the first female infantry officer to command the Queen's Guard at Buckingham Palace, London, Britain June 26, 2017. REUTERS/John Stillwell/Pool 

Captain Megan Couto of the 2nd Battalion, Princess Patricia’s Canadian Light Infantry, poses for a photograph at Wellington Barracks, in central London, Britain June 26, 2017. Couto will make history today when she commands the Queen's Guard, during the Changing of the Guard ceremony, at Buckingham Palace, and becomes the first female infantry officer to do so. REUTERS/Toby Melville 

Captain Megan Couto of the 2nd Battalion, Princess Patricia’s Canadian Light Infantry, poses for a photograph at Wellington Barracks, in central London, Britain June 26, 2017. Couto will make history today when she commands the Queen's Guard, during the Changing of the Guard ceremony, at Buckingham Palace, and becomes the first female infantry officer to do so. REUTERS/Toby Melville 

Captain Megan Couto of the 2nd Battalion, Princess Patricia’s Canadian Light Infantry, poses for a photograph at Wellington Barracks, in central London, Britain June 26, 2017. Couto will make history today when she commands the Queen's Guard, during the Changing of the Guard ceremony, at Buckingham Palace, and becomes the first female infantry officer to do so. REUTERS/Toby Melville 

A captain of the Iraqi Federal police makes his way at the frontline in western Mosul, Iraq June 4, 2017. REUTERS/Alkis Konstantinidis 

Graduate student and U.S. Army Captain Adam Freed speaks to Reuters at William James College of Psychology, the first in the nation to run a program focusing specifically on training military veterans to treat the mental health problems of their fellow soldiers and veterans, in Newton, Massachusetts, U.S., May 16, 2017. REUTERS/Brian Snyder 

King Philippe of Belgium (C) and Captain Neyt (R) attend a demonstration at a military camp in Rukla, Lithuania, May 4, 2017. REUTERS/Stephanie Lecocq/Pool 

Ekaterine Kvlividze, 30, a military pilot captain, poses for a photograph in front of a Georgian Air Force UH-1H helicopter in Tbilisi, Georgia, February 22, 2017. Kvlividze joined the Georgian Air Forces in 2007. "There were some difficulties at the beginning, I felt some irony, cynicism. I felt they did not appreciate me. But, thank God, during the last 10 years society has changed and nowadays a woman pilot is a normal thing." REUTERS/David Mdzinarishvili SEARCH "WOMEN WORK" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.