Polish Prime Minister Donald Tusk joined numerous world leaders in condemning the mass shooting at a Moscow concert in which at least 133 people were killed, urging calm amid the horrific attack. “Poland strongly condemns the brutal attack at the Crocus City Hall in Moscow,” Tusk wrote on X, formerly Twitter, on Saturday evening. “We all grieve for the families of the victims. We hope that this terrible tragedy will not become a pretext for anyone to escalate violence and aggression.” Poland’s Defence Minister Władysław Kosiniak-Kamysz said all of the country’s security agencies were analysing…