Military rules of engagement exist to specify 'who' and 'what' can be attacked. But Defense Secretary Pete Hegseth says the U.S. is fighting Iran without "stupid" rules of engagement. So, what rules ...

Get ready for your aha moment: Every weekday, host Meghna Chakrabarti pierces your news bubble to expose the whole story. Getting answers to the questions that need to be asked, examining our history ...

Until this past January, few outside academic and diagnostic labs knew what quantitative reverse-transcription PCR (RT-qPCR) was, much less its role in viral and bacterial disease detection.