A major strain on the Agreement came up in 1944, when it was revealed to the United States that the United Kingdom had made a secret agreement with Hans von Halban to share nuclear information with France after the war in exchange for free use of patents related to nuclear reactors filed by French physicist Frédéric Joliot-Curie and his Collège de France team. Upon this revelation, the United States and Canada objected, stating that the Halban agreement violated the terms of the Quebec Agreement, namely the section about third-party information-sharing without prior mutual consent. The United Kingdom broke its obligations to France in order to satisfy the United States. Anderson was extremely concerned about alienating the French, and he and the Secretary of State for Foreign Affairs, Anthony Eden, suggested that the French be offered an undertaking that France would subsequently be included in the Manhattan Project, but Churchill did not agree, and remained adamantly opposed to any disclosures to France or the Soviet Union. After the war, the French government repudiated the Halban agreement.