Two explosions, one just outside the Hamid Karzai International Airport in Kabul and another at the nearby Baron Hotel, caused several casualties Thursday. The attacks came less than a day after the U.S. Embassy warned U.S. citizens to get out of the area. Here’s what we know so far: The explosion outside the Kabul airport is “definitely believed” to have been carried out by the Islamic State group, a U.S. official told The Associated Press. The official, who spoke on the condition of anonymity, said the Thursday attacks were carried out by two suicide bombers and gunmen. Pentagon spokesman John...