In an apparent bid to reassure Asian allies and deter potential adversaries, the three types of U.S. Air Force strategic bombers — B-1, B-2 and B-52 — will fly simultaneously in the Pacific for the first time.

The B-1s, which arrived at Andersen Air Force Base in Guam on Aug. 6, will replace the B-52s in support of the U.S. Pacific Command's so-called continuous bomber presence mission. The swap is expected to wrap up at the end of this month as the B-1s return to Guam for the first time since April 2006.

In addition, three B-2 stealth bombers also arrived in Guam for "a bomber assurance and deterrence deployment," Pacific Command said in a statement on its website. It said both the B-1 and B-2 deployments "are part of a long-standing history of maintaining a consistent bomber presence in the Indo-Asia-Pacific region in order to maintain stability and provide assurance to U.S. allies and partners in the region."