Puerto Rico braces for Category One Hurricane Dorian, island is still recovering from devastating 2017 storm; Hurricane Dorian hits Virgin Islands, nears Puerto Rico; Dorian now forecast to hit U.S. mainland as a major hurricane; Sources: Trump told aides he'll pardon them if they break the law to build border wall by 2020; Purdue Pharma in talks to settle opioid lawsuits, may keep selling opioids to finance likely payout; North Korean submarine could threaten U.S. via Knit