US says China gave only hours' notice before submarine missile test

China conducted a submarine missile test with minimal notice, raising alarms in the US and the broader region. This move comes amid China's rapid expansion of its nuclear arsenal, which is shrouded in secrecy and has significant geopolitical implications. The lack of advanced warning underscores the unpredictability and potential risks associated with China's military advancements, prompting concerns about regional stability and the need for greater transparency in military activities. This incident highlights the escalating tensions and the urgent need for diplomatic efforts to manage these developments.