Around lunchtime on April 25, droves of visitors were busy ascending the 213 steps to the summit of Dharahara Tower—one of Kathmandu’s most iconic structures—to take in views of the city and the surrounding valley. At 11:56 a.m., according to survivors, the world started spinning as a 7.8 magnitude earthquake ripped through eastern Nepal. Within minutes, the 19th-century tower collapsed. Rescue workers pulled dozens of corpses, covered in pink dust, from the rubble.