Assaulted by the 1st U.S. Infantry Division and the 29th U.S. Infantry Division, Omaha Beach was divided into four major landing areas: "Charlie," "Dog," "Easy," and "Fox." It was the most heavily defended landing beach and the costliest in casualties. Underestimated German troop strength, poor visibility from lingering smoke after aerial bombings, rough seas, and fog contributed to heavy American losses. The 1st U.S. Infantry Division and 29th U.S. Infantry Division suffered 2,000 casualties. Nazi artillery struck many landing craft before they reached shore, and boats that arrived often landed in the wrong location. The carnage was so intense that Lieutenant General Omar N. Bradley considered abandoning the mission. Small breakthroughs began by late morning, and by evening the Americans held a small presence about 1.5 miles deep. Nearly 35,000 men came across "Bloody" Omaha Beach, with total casualties of 4,700 killed, wounded, or missing. Allied combatant forces included the United States, with the 1st Infantry Division, 29th Infantry Division, U.S. Army Rangers, U.S. Navy, and U.S. Coast Guard, while Axis forces were Germany, including the 352nd Infantry Division and 439th Ost Battalion. Sergeant Peter Cardinali of the 5th Ranger Battalion recalled, "Nothing had prepared me for the terrible shooting all around, all the bodies, all the death." U.S. Navy Coxswain Joseph "Eddie" McCann, Jr., of Everett, Washington, delivered one of the first infantry units of the first wave on D-Day; the youngest coxswain in World War II, he had joined the Navy at 13, was a decorated veteran at 15, had seen action in North Africa and Sicily, and in April 1944 had survived Operation Tiger by rescuing forty-five men from Nazi torpedo boats during a practice maneuver. Radio Technician Fifth Grade John J. Pinder, Jr., age 32, of the 16th Infantry, 1st Infantry Division, from McKees Rocks, Pennsylvania, landed in the first wave as a radio operator, was wounded twice and refused treatment, brought critical radio gear in from the surf, established vital communications on the beach, and received a third, fatal wound; he earned the Medal of Honor. Captain Edwin R. Perry, age 26, of the Corps of Engineers from Weehawken, New Jersey, commanded a demolition squad to remove underwater obstacles; after his boat was hit by artillery, he swam ashore under heavy fire, reorganized the remnants of his team, and led them in demolishing the obstacles so troops and equipment could land safely, earning the Distinguished Service Cross. Life magazine photographer Robert Capa accompanied Company E, 16th Infantry Regiment, 1st Infantry Division, and amid the carnage took about 110 frames before returning on an LCI boat; a darkroom technician dried the film too quickly and destroyed all but eleven shots. The invasion formed part of an intricate multipart attack in which weeks of aerial bombardment before D-Day were followed by further air attacks on German positions in the early hours of June 6, naval gunfire beginning around 0500 hours, amphibious landings, and about 24,000 airborne landings in Normandy by parachute or glider.