Curtis Hill, a 26-year city and regional engineer, was at the event to monitor the activities. He was among the first to arrive after it began at 6 a.m. At first responders were waiting to begin the deployment of emergency teams, including the four-car, fully charged, COVID-19, vehicle, and two-axle armored truck equipped with bomb-sniffing dogs, to investigate what would be a terrifying scene. From inside the cab and the ground floor, firefighters would look the direction of the blast for a second or three seconds when the blast itselfwhich may only generate a few centimeters of movementwould commence through the opening.
At 7:00 a.m., the first responders from Boston and New York began to deploy. Three emergency response teams (ETT) began deploying from Watertown and the West Station, from 10:30 a.m. to 11:30 a.m. One was at Watertown, one at Watertown/Dupont Street, and one at the West Street station and Stapleton, all at 9:00 a.m. at the highest possible call volume. The team at Stapletona specialized fire protection engineer teamformed the core of three full CTMP units, at 9:15 a.m. at West Stapleton and 4:15 p.m., at Watertown/Dupont Street. The first teams, along with the tactical team and members of the bomb squad, were at West Stapleton in a fully charged, high pressure fire truck. (The fire chief confirmed later that the initial CTMP team made contact with members of the SWAT team a few minutes after the bombing. He said the presence of members of the SWAT unit also made it easier for the emergency response team to make contact with them.)The three EMT teams deployed from Watertown continued along the Watertown River, moving east to South Station, the site of the attack. There, they were joined by a tactical team from Watertown, and an EMT team from the West Station, from the 7:00 a.m. EMT call.The tactical team deployed from Watertown comprised a bomb squad member; three tactical officers; a bomb expert; a paramedic in a specialized unit; a medic; a detective; an engineer in a full-rigged, armored vehicle; a firefighter; and one firefighter from Longueuil, the city of 2.5 million people. The tactical team was comprised of one engineer and two more firefighters, from Longueuil. This would be followed by a two-engine and a six pump truck with the support crew of six firefighters and a heavy equipment operator (HOE), as a tactical team member. The full CTMPalso in the West Stationformed the core of the tactical team from the 7:00 a.m. call that led to the deployment of EMT teams from both Watertown and West Stapleton. The tactical team, for comparison, comprised three-engine and four-engine pumps, three heavy equipment operators, and an HOE, plus four bomb expert, five technicians, and two emergency crew members.The tactical unit deployed from Watertown was also comprised of a civilian, two members of the SWAT team, and three other law enforcement personnel. The tactical team comprised an EMT, the tactical-response expert, a communications specialist, an electrical technician, a weapons tech, and four members of the tactical police unit. The CTOP consisted of two EMTs and one engineer. The tactical unit comprised: a bomb team; a bomb technician; a high pressure water truck; and a full rig and 6 pump truck. While the tactical team deploy from West Stapleton, the CTOP has an EMT, engineer, communications analyst, communications operator, an EMT, heavy equipment operator, and one member of the tactical police unit. In addition, the CTOP also deploys from the West Stapleton station.The full CTMP deploys from the Watertown station, while the CTOP deploys from West Stapleton.In the West Station, the bomb squad was comprised of three EMTs. The tactical team comprised three EMTs, two tactical officers, and two detectives. The tactical-response expert was a civilian with an engineering staff. While the tactical team deploy from water, the bomb expert deploys from the West Station. In addition, the CTOP deploys from the West Stapleton station.The CTMP comprises one investigator, three EMTs, two tactical officers, and two detectives.The bomb squad deployed from the Watertown station was a civilian; six officers were also on duty. The full CTMP deploys from West Stapleton, while the CTOP deploys from West Stapleton.The CTMP deploys from the West Station, while the CTOP deploys from the West Stapleton.The tactical team deployed from the West Stapleton station was a civilian