A security guard (R) wearing a face mask keeps people outside Terminal 1 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

A staff member of the Canadian Air Transport Security Authority (CATSA) wearing a face mask walks past concrete barriers with painted new policies at Terminal 3 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

A woman wearing a face mask (R) embraces a man outside Terminal 1 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

Concrete barriers with painted new policies are seen at Terminal 3 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

A traveler wearing a face mask arrives at Terminal 1 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

A traveler arrives at Terminal 1 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)

Travelers arrive at Terminal 1 of Toronto Pearson International Airport in Toronto, Canada, on June 1, 2020. Toronto Pearson International Airport implemented new health and safety measures such as mandatory face coverings and the barring of "meeters and greeters" from inside its terminals to help reduce the spread of COVID-19 on Monday. (Photo by Zou Zheng/Xinhua)