U.S. President Joe Biden and first lady Jill Biden pin a flower on a memorial wreath at the 40th annual National Peace Officers' Memorial Service at the U.S. Capitol in Washington, U.S., October 16, 2021. REUTERS/Tom Brenner

U.S. President Joe Biden and first lady Jill Biden pin a flower on a memorial wreath at the 40th annual National Peace Officers' Memorial Service at the U.S. Capitol in Washington, U.S., October 16, 2021. REUTERS/Tom Brenner

A bouquet of flowers is seen as people attend a vigil for MP David Amess, who was stabbed to death during a meeting with constituents, at Civic Centre in Southend-on-Sea, Britain October 16, 2021. REUTERS/Tony O'Brien

Members of the local Muslim community lay flowers in tribute to British MP David Amess, who was stabbed to death during a meeting with constituents, near the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Police officers look on as a man lays flowers outside the Belfairs Methodist Church, where British MP David Amess was stabbed to death during a meeting with constituents, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Chief Constable of Essex Police B. J. Harrington, Britain's Labour Party leader Keir Starmer, Prime Minister Boris Johnson, Speaker of the House Sir Lindsay Hoyle and Home Secretary Priti Patel hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls TPX IMAGES OF THE DAY

Britain's Labour Party leader Keir Starmer and Prime Minister Boris Johnson hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Chief Constable of Essex Police B. J. Harrington, Britain's Labour Party leader Keir Starmer and Prime Minister Boris Johnson hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Britain's Prime Minister Boris Johnson, Labour Party leader Keir Starmer and Chief Constable of Essex Police B. J. Harrington hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Chief Constable of Essex Police B. J. Harrington, Britain's Labour Party leader Keir Starmer, Prime Minister Boris Johnson and Speaker of the House of Commons Lindsay Hoyle hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Britain's Home Secretary Priti Patel holds flowers as she arrives at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Britain's Labour Party leader Keir Starmer and Prime Minister Boris Johnson hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Chief Constable of Essex Police B. J. Harrington, Britain's Labour Party leader Keir Starmer, Prime Minister Boris Johnson and Speaker of the House of Commons Lindsay Hoyle hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Chief Constable of Essex Police B. J. Harrington, Britain's Labour Party leader Keir Starmer, Prime Minister Boris Johnson, Speaker of the House of Commons Lindsay Hoyle and Home Secretary Priti Patel hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

Britain's Labour Party leader Keir Starmer, Prime Minister Boris Johnson and Home Secretary Priti Patel hold flowers as they arrive at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

A police officer stands next to flowers laid in tribute at the scene where British MP David Amess was stabbed to death during a meeting with constituents at the Belfairs Methodist Church, in Leigh-on-Sea, Britain, October 16, 2021. REUTERS/Peter Nicholls

A woman brings flowers to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

Flowers are laid down at the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

A woman brings flowers to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

Flowers and a ballon are pictured outside the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

Flowers and a ballon are pictured outside the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

Flowers and a ballon are pictured outside the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

Flowers lie outside the local conservative association and constituency office of stabbed MP David Amess after he was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Peter Nicholls

Flowers lie next to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

Flowers lie next to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

A woman brings flowers to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

Flowers are laid down at the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

A woman brings flowers to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

A woman brings flowers to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Tony O'Brien

Flowers are placed next to the scene where MP David Amess was stabbed during constituency surgery, in Leigh-on-Sea, Britain October 15, 2021. REUTERS/Andrew Couldridge

A demonstrator gives a flower to a police officer as anti-vaccine protesters gather to protest against the Green Pass becoming mandatory in the workplace, in Rome, Italy, October 15, 2021. REUTERS/Yara Nardi

Britain's Prime Minister Boris Johnson plants flower bulbs with school children during a visit to Westbury-On-Trym Church of England Academy, prior to a regional cabinet meeting in Bristol, Britain October 15, 2021. Steve Parsons/Pool via REUTERS

Britain's Prime Minister Boris Johnson plants flower bulbs with school children during a visit to Westbury-On-Trym Church of England Academy, prior to a regional cabinet meeting in Bristol, Britain October 15, 2021. Steve Parsons/Pool via REUTERS

Britain's Prime Minister Boris Johnson plants flower bulbs with school children during a visit to Westbury-On-Trym Church of England Academy, prior to a regional cabinet meeting in Bristol, Britain October 15, 2021. Steve Parsons/Pool via REUTERS

Flowers are placed in front of a damaged residential building following a fire in Kaohsiung, Taiwan October 15, 2021. REUTERS/I-Hwa Cheng

A man carrying flower garlands walks through a crowded market ahead of the religious festival of Dussehra, amidst the spread of the coronavirus disease (COVID-19) in Mumbai, India, October 14, 2021. REUTERS/Francis Mascarenhas

Soccer Football - Funeral of former Liverpool and England's 1966 World Cup winning footballer Roger Hunt - Liverpool Cathedral, Liverpool, Britain - October 14, 2021 Flowers are delivered at Liverpool Cathedral for the funeral ceremony of Roger Hunt Action Images via Reuters/Molly Darlington

A butterfly hangs from a flowering branch at Brooklyn Bridge Park in the Brooklyn borough of New York City, U.S., October 13, 2021. REUTERS/Shannon Stapleton

Britain's Queen Elizabeth II receives flowers as she leaves after attending a Service of Thanksgiving to mark the Centenary of the Royal British Legion at Westminster Abbey, London, Britain October 12, 2021. Frank Augstein/Pool via REUTERS

Britain's Queen Elizabeth II holds flowers as she leaves after attending a Service of Thanksgiving to mark the Centenary of the Royal British Legion at Westminster Abbey, London, Britain October 12, 2021. Frank Augstein/Pool via REUTERS

Britain's Queen Elizabeth receives flowers as she and Anne, Princess Royal, attend a Service of Thanksgiving to mark the Centenary of the Royal British Legion at Westminster Abbey, London, Britain October 12, 2021. Arthur Edwards/Pool via REUTERS

A wild flower meadow is pictured at 'The Modernist Glade,' a temporary public art project devised by Hayatsu Architects and artist Tue Greenfort, with curator and producer Aldo Rinaldi, in Milton Keynes, Britain, October 11, 2021. REUTERS/Andrew Boyers

A sign indicating a beehive and wild flower meadow, a part of 'The Modernist Glade,' a temporary public art project devised by Hayatsu Architects and artist Tue Greenfort, with curator and producer Aldo Rinaldi, in Milton Keynes, Britain, October 11, 2021. REUTERS/Andrew Boyers

A beehive and wild flower meadow are pictured at 'The Modernist Glade,' a temporary public art project devised by Hayatsu Architects and artist Tue Greenfort, with curator and producer Aldo Rinaldi, in Milton Keynes, Britain, October 11, 2021. REUTERS/Andrew Boyers

A beehive and wild flower meadow are pictured at 'The Modernist Glade,' a temporary public art project devised by Hayatsu Architects and artist Tue Greenfort, with curator and producer Aldo Rinaldi, in Milton Keynes, Britain, October 11, 2021. REUTERS/Andrew Boyers

A vendor selling marigold garlands, which are used to decorate temples and homes during the Hindu festival of Durga Puja, waits for customers at a wholesale flower market, amidst the coronavirus disease (COVID-19) pandemic, in Kolkata, India, October 11, 2021. REUTERS/Rupak De Chowdhuri

A woman photographs vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A person looks at a field of vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A woman looks at a field of vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

One World Trade Center is seen from a field of vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A woman walks through a field full of vases with white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A field of vases full of white flowers are seen as part of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A man walks dogs through a field full of vases with white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

The Statue of Liberty is seen from a field of vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A woman photographs vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

People photograph vases full of white flowers; that are apart of an installation of One-thousand-fifty vases filled with white flowers, representing 1,050 lives lost to gun violence in New York last year, in Battery Park in New York City, U.S., October 6, 2021. REUTERS/Brendan McDermid

A relative of a fallen New York City Fire Department (FDNY) officer stands with a flower as firefighters march past at the annual FDNY memorial service for members who died in 2021, at the Fireman's Memorial on Manhattan's upper west side in New York City, New York, U.S., October 6, 2021. REUTERS/Mike Segar

Four-year-old Elliana Barresi, the daughter of late New York City Fire Department (FDNY) officer Carmine J. Barresi, holds a flower at the annual FDNY memorial service for members who died in 2021, at the Fireman's Memorial on Manhattan's upper west side in New York City, New York, U.S., October 6, 2021. REUTERS/Mike Segar TPX IMAGES OF THE DAY

A student is showered with flowers as she has her pulse checked in a school following the reopening after over a year of closure due to the coronavirus disease (COVID-19) pandemic in Mumbai, India, October 4, 2021. REUTERS/Francis Mascarenhas

Japan's outgoing Prime Minister Yoshihide Suga receives a bouquet of flowers as staff members see him off as he leaves the prime minister's office in Tokyo, Japan, October 4, 2021. REUTERS/Issei Kato