Hoang Thi Hoa, who lost both legs and an arm due to unexploded ordnance (UXO) during the Vietnam War, is assisted by her daughter Nguyen Thi Ha Lan, a member of all-female landmines clearance team, at their house in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Tran Hoang Yen, a member of all-female landmines clearance team, detects unexploded ordnances on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team listen to their captain before their morning work at a bombs and landmines exhibition in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team search for unexploded ordnances on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Hoang Thi Hoa (L), who lost both legs and an arm due to unexploded ordnance (UXO) during the Vietnam War, and her daughter Nguyen Thi Ha Lan, a member of all-female landmines clearance team, talk at their house in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Captain Nguyen Thi Thuy of all-female landmines clearance team carries boxes of detonators to destroy unexploded ordnances found on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team get ready for their work on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team sit under the shadow of a tree for their lunch on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team walk past the shells of U.S. military bombs used during Vietnam War, at a bombs and landmines exhibition in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

A member of all-female landmines clearance team prepares equipment for their work on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Captain Nguyen Thi Thuy of all-female landmines clearance team marks detected zones on a map of Hai Lang district, near a former U.S military base used during Vietnam War, in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team search for unexploded ordnances on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

A member of all-female landmines clearance team searches for unexploded ordnances on a field in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Members of all-female landmines clearance team look at a sample of B-bomb at a bombs and landmines exhibition in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

Shells of U.S. bombs used during Vietnam War are displayed at a bombs and landmines exhibition in Quang Tri province, Vietnam March 4, 2020. Picture taken March 4, 2020. REUTERS/Kham

A landmine warning sign is seen near the contact line between Ukrainian troops and pro-Moscow rebels in the settlement of Stanytsia Luhanska, Ukraine November 20, 2019. REUTERS/Gleb Garanich

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on patrol in the demilitarized zone (DMZ), practises at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

An empty wheelchair is seen as former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on a patrol in the demilitarized zone (DMZ), takes part in a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on patrol in the demilitarized zone (DMZ), prepares for a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on a patrol in the demilitarized zone (DMZ), poses for photographs before a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on patrol in the demilitarized zone (DMZ), practises at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji TPX IMAGES OF THE DAY

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on patrol in the demilitarized zone (DMZ), practises at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on a patrol in the demilitarized zone (DMZ), puts on his artificial legs after a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on a patrol in the demilitarized zone (DMZ), puts on his artificial legs after a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Former South Korean Army sergeant, first class, Ha Jae-hun, who lost both his legs in 2015 when he stepped on a North Korean landmine while on a patrol in the demilitarized zone (DMZ), drinks water after a practice session at Misari Rowing Stadium in Hanam, South Korea September 24, 2019. Picture taken September 24, 2019. REUTERS/Kim Hong-Ji

Britain's Prince Harry meets landmine victim Sandra Tigica, who Princess Diana met on her visit to Angola in 1997, during a reception at the British Ambassadors Residence in Luanda, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets landmine victim Sandra Tigica, who Princess Diana met on her visit to Angola in 1997, during a reception at the British Ambassadors Residence in Luanda, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry meets landmine victim Sandra Tigica, who Princess Diana met on her visit to Angola in 1997, during a reception at the British Ambassadors Residence in Luanda, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

A crowd gathers on Princess Diana Street ahead of the arrival of Britain's Prince Harry, Duke of Sussex, in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

A crowd gathers on Princess Diana Street ahead of the arrival of Britain's Prince Harry, Duke of Sussex, in Huambo, Angola September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, and Halo Regional Manager Jose Antonio watch as Mine Clearer Jorge Joao Cativa demonstrates mine clearing techniques during his visit to a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, speaks with Halo Regional Manager Jose Antonio during his visit to a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, makes a speech during his visit to a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, speaks with Halo Regional Manager Jose Antonio as he visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, and Halo Regional Manager Jose Antonio watch as Mine Clearer Jorge Joao Cativa demonstrates mine clearing techniques during his visit to a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, remotely detonates a landmine as he visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, remotely detonates a landmine as he visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS

Britain's Prince Harry, Duke of Sussex, visits a working de-mining field with the HALO Trust in Dirico Province, Angola, September 27, 2019. Dominic Lipinski/Pool via REUTERS