It was Undersecretary of State Victoria Nuland. She was asked on March 8th by Marco Rubio about whether Ukraine had biological or chemical weapons. She said they had biological research facilities and they were concerned that they might fall into Russian hands. Tulsi Gabbard pointed out these facilities studied deadly pathogens that could potentially be released into the environment either on purpose or accidentally if Russian troops broke into them. She was encouraging our government to press the Ukrainians to destroy the pathogens to prevent this. She never once said bioweapons.And who was that top Biden official? In what capacity did they serve?