By the time Second Lieutenant María Camila Mora Mahecha arrived in Bogotá on November 26, the afternoon drizzle in Colombia’s capital had given way to an overcast evening. Despite the drab weather and long journey, the 27-year-old had something to look forward to: she was going to the Beéle concert at the city’s Movistar Arena that night with friends. Mora had driven 120 miles (195 km) from Duitama, where she was taking a specialization course, …