The U.S Air Force has concluded that all six crew members aboard a B-52 bomber that crashed off Guam were killed.

“Two bodies of the six crew have been found and the other four remained missing.” reported by the Air Force. “Losing this bomber crew has been a tragedy felt by everyone here and across the Air Force,” said Brig. Gen. Doug Owens, commander of the 36th Wing.

The six crew members were identified as Maj. Christopher M. Cooper, 33, aircraft commander; Maj. Brent D. Williams, 37, navigator; Capt. Michael K. Dodson, 31, co-pilot; 1st Lt. Joshua D. Shepherd, 25, navigator; 1st Lt. Robert D. Gerren, 32, electronic warfare officer; and Col. George Martin, 51, flight surgeon, who also was the deputy commander of 36th Medical Group at Andersen Air Force Base.

The bodies of Cooper and Williams were recovered, the Air Force said.

The accident is the second for the US Air Force this year on Guam. In February, a B-2 crashed at Andersen Air Force Base in the first- ever loss of a stealth bomber. The military estimated the loss of the aircraft at 1.4 billion dollars.

First jet powered aircraft to fly
The Heinkel He 178, on August 27, 1939. Powered by a Heinkel He S 3B engine, the flight lasted six minutes.

First twin engined jet to fly
The Heinkel He 280, on March 30, 1941. Powered by two Heinkel He S 8’s, the flight lasted only three minutes due to concerns of the engines possibly overheating.

First four engined jet to fly
The Arado AR 234C, in April 1944. The aircraft was powered by four BMW 003 jet engines.

First six engined jet aircraft to fly
The Junkers EF 131, around late 1946. Each forward swept wing had a large pod, each containing three Jumo 004C engines.

First aircraft to have variable sweep wings
The Messerschmitt Me P1101, though it never flew as its construction was brought to a halt when World War II ended. The wings could not be moved in flight, only on the ground.

First flight across the Pacific Ocean
Accomplished by Sir Charles Kingsford-Smith, from Oakland, California, to Brisbane, Australia, in 1928.

First around-the-world passenger service by an airline
Started by Qantas in 1958.

First jet engine to ever run
The hydrogen fueled Heineken He S 2, created by Professor Ernst Heinkel, in March 1937.

Rescue crews searched a vast area off the island of Guam for crew members of an Air Force B-52 Bomber last July 21, 2008.

The Coast Guard said there were at least two people recovered from the waters, but their condition was not immediately available.  The search involves six vessels, three helicopters, two F-15 fighter jets and a B-52 Bomber were involved in the search, covering about 70 square miles of ocean.

The B-52 Bomber based at Barksdale Air Force in Louisiana was en route to conduct a flyover in a parade when it crashed around 9:45 a.m. Monday about 30 miles northwest of Apra Harbor.

The Liberation Day parade celebrates the day when the U.S. military arrived on Guam to retake control of the island from Japan.

The accident will be further investigated by the Air Force board of officers.  The accident was the second for the Air Force this year on Guam, a U.S. territory 3,700 miles southeast of Hawaii.

The new “anti-terrorism manual” is the latest in a string of warnings issued by an increasingly jittery Chinese government in the run-up to the Aug. 8-24 Olympics. In addition to worries over foreign terrorist plots, Beijing is also concerned about political protests from domestic critics.

China has already installed checkpoints on roads and subway stations around the capital, as well as areas which border Hebei province. Chinese authorities will close Beijing’s airport for about five hours during the opening ceremony of the Olympics, affecting dozens of flights, local media and airlines.

Hong Kong-based Cathay Pacific said it would postpone one flight after receiving word that the airport would be closed during the ceremony. Cathay Pacific said they were informed that Beijing Capital International Airport would be close from 7 pm to midnight on August 8. Air China said the airline had also received a notice that the airport would be closed.

Authorities have also cracked down on bars and performers. A warning for entertainers was reissued Thursday cautioning against acts that could tarnish the country’s cultivated image of order and control.