罕见！美军“核嗅探”飞机在多州上空飞行

Core Viewpoint - The U.S. Air Force's Boeing WC-135R "Constant Phoenix" reconnaissance aircraft conducted flights over several states to monitor nuclear test activities, coinciding with the expiration of the U.S.-Russia New START treaty on February 5 [1][3]. Group 1: Aircraft Operations - The WC-135R aircraft took off from Nebraska, flew over South Dakota, and circled near Fargo, North Dakota, before heading to Rapid City, South Dakota [3]. - This aircraft is specially modified with an onboard atmospheric collection system to gather air samples for detecting radioactive materials from nuclear explosions [3]. Group 2: Purpose and Context - The flights are typically for crew training, equipment calibration, or background radiation monitoring, and are not usually announced unless significant events occur [3]. - The timing of this flight has drawn attention due to the impending expiration of the New START treaty, which governs nuclear arms control between the U.S. and Russia [3]. Group 3: Political Implications - The article references a previous statement by President Trump ordering the military to resume nuclear weapons testing after a 33-year hiatus, which has raised concerns about potential escalations in nuclear testing by both the U.S. and Russia [3].