The United States government sued Arizona Gov. Doug Ducey and the state on Wednesday over the placement of shipping containers as a makeshift wall on the border with Mexico. Through KJZZ's Q&AZ project, one listener asked: Why isn’t there a checkpoint when you drive back to Arizona? This week marks two years since the U.S. began distributing and administering COVID-19 vaccines. Plus the latest Fronteras Desk, metro Phoenix, education and tribal resources news.