Participants wearing masks during a hazy day at the Beijing International Marathon in front of Tiananmen Square, in Beijing, October 19, 2014. (Photo by Reuters/Stringer)
A Virgin Atlantic passenger plane flies in the sky with the moon seen in the background, in London, Britain January 19, 2016. (Photo by Toby Melville/Reuters)
A woman uses a face masks as a preventive measure against the spread of the new coronavirus, COVID-19, in Bogota, on March 19, 2020. Colombia will block all international flights from Monday for 30 days, President Ivan Duque announced on Thursday. (Photo by Raul Arboleda/AFP Photo)
People stand in queue keeping social distance beside a Covid-19 awareness scarecrows placed by Chennai municipality at a market during a government-imposed nationwide lockdown as a preventive measure against the COVID-19 coronavirus, in Chennai on April 11, 2020. (Photo by Arun Sankar/AFP Photo)