The United States Air Force announced a new generation of stealth bomber official Code: Official renderings b-21 (Figure) meeting site b-21 (lrs-b), according to defense news reported on February 26, on the day of the United States Air Force Association to host the 2016 annual air war discussion meeting, the US Air Force Secretary Deborah & middot; Li & middot; James officially announced the U. s.military under the generation of strategic bombers lrs-b formal name: b-21. James also said the new bomber’s official nickname has not yet been determined, she called on the United States Air Force pilot suggestions. strategic bomber has been one of the important pillars of the United States "Trinity" nuclear strike capability. At present, the United States Air force is planning to modernize its nuclear strike means to modernize, which includes a new generation of strategic bombers – LRS-B. On 27 October 2015, the Pentagon announced Northrop & middot; Grumman won the lrs-b project bidding, so Boeing and Lockheed Martin also to the Government Accountability Office submitted a 133 page complaint, but the lawsuit was rejected the U. S. government. On the 26th meeting, US Air Force Secretary Deborah & middot; Li & middot; James announced lrs-b official number: b-21. This naming is given to LRS-B is the United States into the twenty-first Century after the first bomber. According to tradition, b-21 will also identify an official nickname, James suggested that the United States Air Force pilots involved in the name of the new bomber consulting activities to. The meeting also announced the first official rendering of B-21. And after the news came, B-21 B-2 using a similar wing, but the shape of B-2 has been simplified. In accordance with the U.S. Army’s war to decide, B-21 in addition to the implementation of conventional bombing and nuclear strike, but also to take on reconnaissance and electronic warfare missions, plans to equip hundreds of. This, the United States Air Force Global Strike Command commander Robin & middot; admiral Rand said, because in the foreseeable human resources and funding constraints, the bomber fleet increased pilots, aircrew and maintenance personnel, additional logistical support training would be "extremely difficult", he b-21 can increase the combat effectiveness of the bomber fleet to doubt.