Children wave Vietnamese and American flags while waiting for arrival of U.S. President Barack Obama (not pictured) before a welcoming ceremony at the Presidential Palace in Hanoi, Vietnam May 23, 2016. (Photo by Reuters/Kham)

Luke Personius, 12, waits for a wave as he surfs before school at sunrise in Hermosa Beach, California April 2, 2015. The group of friends surf at sunrise most mornings, then shower outside and walk to school. (Photo by Lucy Nicholson/Reuters)

Two copper sharks ride the waves in Red Bluff Beach, Australia on July, 2020. Professional photographer Sean Scott, 43, from Burleigh Heads, Australia, caught the stunning snap. (Photo by Sean Scott/MediaDrumImages/@seanscottphotography)

A girl walks past outside a house damaged by tidal waves at Meulaboh beach in Aceh province on July 12, 2020. (Photo by Chaideer Mahyuddin/AFP Photo)

A propaganda troupe perform a flag- waving routine outside the central railway station in Pyongyang, North Korea on September 27, 2017. (Photo by Ed Jones/AFP Photo)

Princess Anne, Princess Royal waves off Zara Philips as she eaves Canongate Kirk on the afternoon of her wedding to Mike Tindall on July 30, 2011 in Edinburgh, Scotland. (Photo by Chris Jackson PT/Getty Images)

A kite surfer takes advantage of high winds and waves off Blackpool seafront on January 12, 2012 in Blackpool, England. Meteorologists are predicting calmer weather after high winds hit many parts of the North West today. (Photo by Christopher Furlong/Getty Images)

Liu Yang, China's first female astronaut, waves during a departure ceremony at Jiuquan Satellite Launch Center, on June 16, 2012. (Photo by Jason Lee/Reuters via The Atlantic)