NYC gunman, US snubs climate summit, first transcontinental railway & more

Authorities believe the gunman in the New York City mass shooting went to the wrong floor. Israel says more aid packages have been air dropped into Gaza. The US is sitting out of what could be one of the most significant climate summits in decades. It’s about to get cooler in the US – we'll tell you why that could bring its own problems. Plus, two American railway giants want to merge. Learn more about your ad choices. Visit podcastchoices.com/adchoices