Two closed Canadian border checkpoints are seen after it was announced that the border would close to "non-essential traffic" to combat the spread of COVID-19 at the U.S.-Canada border crossing at the Thousand Islands Bridge in Lansdowne, Ont., March 19, 2020. Photo by Alex Filipe /REUTERS / FILES
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VANCOUVER — Canadian border guards and customs officials voted on Tuesday to go on strike just days before fully vaccinated U.S. citizens and permanent residents will be allowed into Canada, unions representing the workers said, a move that could potentially cause disruptions and hurt businesses emerging out of the pandemic-driven economic downturn.