![](http://www.ecns.cn/hd/2020/05/06/f84326c4f7e84382aa14925e862a5d7d.jpg)
Skywriting planes spell out messages of thanks to first responders and healthcare workers over Manhattan during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., May 5, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/05/06/2656fd5be7ca4d429c1feb1b23e527a0.jpg)
Skywriting planes spell out messages of thanks to first responders and healthcare workers over Manhattan during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., May 5, 2020. (Photo/Agencies)
![](http://www.ecns.cn/hd/2020/05/06/e68f98b9efe7447c99c698001a616475.jpg)
Skywriting planes spell out messages of thanks to first responders and healthcare workers over Manhattan during the outbreak of the coronavirus disease (COVID-19) in New York City, New York, U.S., May 5, 2020. (Photo/Agencies)