The Financial Post reports in its Thursday, Jan. 11, edition that hundreds of Panamanian construction workers staged a demonstration at a shuttered copper mine that has become the subject of nationalistic sentiment in the Central American nation. A Reuters dispatch to the Post reports that members of the Suntracs union waved flags at the entrance to the mine operated by Canada's First Quantum Minerals and hung a giant sign across the main gate that read: "This is sovereign territory" on Jan. 9. One worker wrapped a chain around the gates and padlocked them shut. Suntracs, which played a key role in protests that led to the mine's closure late last year, planned the demonstration to coincide with Martyrs' Day, which commemorates anti-United States riots in 1964 over sovereignty of the Panama Canal. Head of the union, Saul Mendez, said at the demonstration workers will remain vigilant and ensure the mine remains permanently closed, even after Panama's presidential election in May. He called on members to support independent candidate Maribel Gordon, who has consistently opposed the mine. She is currently polling last.