Union of Concerned Scientists

The provided news articles focus on the Trump administration's actions regarding foreign researchers and withdrawal from international organizations, particularly those related to climate change. One article details a directive for USDA employees to investigate foreign scientists collaborating with the agency, while the other reports on the US withdrawal from numerous international groups, many linked to climate action. Neither article mentions the Union of Concerned Scientists (UCS). Therefore, it's impossible to determine why the UCS is newsworthy, recent events involving them, or their current relevance based solely on these articles. To provide a summary about the UCS, articles specifically mentioning the organization are required.