Pandemic trivia: Which country has the highest COVID-19 vaccination rate in the world? The answer is the United Arab Emirates. The UAE boasts a vaccination rate higher than 90%. We look into what's driven the country’s massive success. Also, in the Arctic, the ground is literally disappearing. Roads, bridges and infrastructure are built on permafrost. But with climate change, that's starting to thaw. Plus, tensions are on the rise in Bosnia. Experts are calling this its worst crisis in more than 25 year as Bosnian Serbs seem poised to pull out of the government that they share with Bosnian Croats and Muslims.