U.S. backs security guarantees for Ukraine at Paris summit.

The United States backed a coalition's pledge of binding security guarantees for Ukraine at a Paris summit, and leaders said allies would join a proposed U.S.-led ceasefire monitoring and verification plan.

The United States for the first time publicly backed a coalition of Ukraine's allies at a summit in Paris that pledged legally binding security guarantees to support Kyiv if Russia attacks again. The meeting aimed to firm up assurances tied to a possible ceasefire and to outline how allied countries would help monitor compliance. Coalition leaders said monitoring would likely rely on drones, sensors and satellites rather than U.S. troops. Ukrainian officials said the details of support, monitoring and financing still need to be worked out. Key facts: - The United States backed coalition pledges of binding security guarantees to support Ukraine if it is attacked. - Leaders said allies would participate in a proposed U.S.-led ceasefire monitoring and verification mechanism likely to use drones, sensors and satellites, not U.S. troops. - Ukrainian President Volodymyr Zelenskyy welcomed the agreements but said details of monitoring, army support and financing remain to be determined, and the Ukrainian delegation would continue talks on Wednesday. Summary: The U.S. backing signals alignment with a European-led framework intended to deter further attacks and provide support tied to a ceasefire; the precise legal commitments and roles remain to be finalized. Ukrainian and allied officials said negotiations would continue, with talks scheduled to proceed on Wednesday to work through outstanding details.