Transportation Secretary Sean Duffy warned as many as 20% of flights could be canceled if the government shutdown drags on.

Laser-painting targets, is one of the most dangerous jobs in the United States military. However, laser-equipped backpack drones might mitigate the risk.

不少导致呼吸道和胃肠道疾病的病原体在体外存活的时间并不长。一项针对新冠病毒的建模研究发现，病毒在棉质衣物上会比较快地失活，甚至，仅乘车通勤后回家，衣物上有传染性的病毒量就可能减少80%之多。