"Key Updates: Ukraine, Heatwave, Strikes, AI, E-cigarettes - July 21, 2023"

Russian missile strikes target grain warehouses in southern Ukraine, destroying crops and destabilizing Ukraine's ability to export food; over 100 million people in the southern US are under heat alerts as abnormally high temperatures persist; a Broadway strike is averted, but other unionized workers in various industries threaten to go on strike; leading AI companies commit to outside testing and labeling of AI systems to ensure safety and combat fraud; CDC report shows that over 1 in 10 young adults in the US regularly use e-cigarettes, despite risks for heart and lung disease.