PHOTOPhotograph by David L. Ryan/The Boston Globe/Getty ImagesShock Monday, Patriots' Day in Massachusetts, started out as a day of celebration, a holiday officially dedicated to freedom—and unofficially, with the running of the 117th Boston Marathon, to the power of athletic competition. The spirit of the day was trampled shortly before 3 p.m., when two bombs exploded near the Boylston Street finish line as hundreds of runners were still streaming toward it. Police had not identified a suspect or motive as of Monday evening, when three people were confirmed dead. PHOTOPhotograph by John Tlumacki/The Boston Globe/Getty ImagesBlood The blasts turned the area around the marathon finish line into a scene of horror, the sidewalks littered with shattered glass, blood and severed limbs. Dr. Alasdair Conn, the chief of emergency medicine at Massachusetts General Hospital, told reporters that the bombings were military-style, saying, "This is like a bomb explosion we hear about in the news in Baghdad." PHOTOPhotograph by Winslow Townson/APTears The blasts brought Boston to a standstill on one of its busiest days of the year. As police swept the city searching for more explosives, the mass transit system was shut down. Residents and visitors were asked to stay in their homes or hotels. And cellphone service slowed due to overwhelming demand—adding to the chaos for shell-shocked runners who found leaving the scene and reaching loved ones difficult. PHOTOPhotograph by Yoon S. Byun/The Boston Globe/Getty ImagesConfusion Many of the 23,000 runners who started the marathon were not permitted to finish it; police stopped the field at an intersection not far from the finish line shortly after the blasts. Greg Meyer, the 1983 Boston champion, was running with his son Danny and did finish. "I told Danny, who was struggling the last three miles, 'Thank God you kept running,' " Meyer told the Boston Herald. "[We] would have been there right [at the finish line] about then."