World headquarters in new york, this is nbc nightly news with kate snow. Good evening. At the beginning of the holiest week on the christian calendar, churches were packed all over the world today, and when isis targeted Egypts Christian minority with bombings at two churches in cities north of cairo, the loss of life and devastation were extensive. A state of emergency has been declared and the military deployed across the country. The attacks comes pope francis is set to visit egypt later this month, a trip the vatican says will go on as planned. Our matt bradley is in cairo tonight. Reporter a day of devotion turned to horror. A crowded palm sunday mass in cairo, ripped apart by what they believe was a bomb placed under a pew. Hours later a suicide bomber scene at st. Marks church in alexandria. Security shows a man blowing himself up feet away from a playing child, after Police Stopped him from entering the church. That officer now hail as a hero. The twin bombings have left at lea