U.S. teacher's unions protest for school safety measures
CGTN
02:57

Many schools in the United States have reopened remotely or with only partial in-person instruction this fall. 

This is after teachers' unions across the country protested and threatened to strike. 

Their concerns are mainly centered around school safety. 

But in some areas, the unions are pushing for other longstanding demands. 

Some parents say the unions are being unreasonable. 

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