F-22 fighters allowed back in the air: US Air Force

The US Air Force said Monday its fleet of F-22 fighter jets will be allowed back in the air after officials grounded the planes over concerns about the aircraft's oxygen system.

The F-22 Raptors, the most advanced combat aircraft in the world, were barred from flying for four months, a highly unusual move that reflected serious worries over safety.

"We now have enough insight from recent studies and investigations that a return to flight is prudent and appropriate," Air Force chief of staff General Norton Schwartz said in a statement.

"We're managing the risks with our aircrews, and we're continuing to study the F-22's oxygen systems and collect data to improve its performance," said.

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US suggests it will supply Taiwan with F-16 upgrades

A senior US administration official all but confirmed reports that the United States will help Taiwan upgrade its 145 US-made F-16 A/B fighter jets.

The official, speaking to reporters on the condition of anonymity on Monday, could not confirm the information until Congress is notified of the administration's decision, which the official said will happen "Wednesday afternoon."

The official sought to clarify leaked reports about the F-16s after saying "something got lost in translation" amid suggestions that Washington was caving in to a powerful China.

"Assuming the decision is to upgrade F-16 A/Bs, they will provide essentially the same quality as new F-16 C/D aircraft at a far cheaper price," the senior US official said.

"And Taiwan would stand to get 145 A/Bs versus only 66 C/Ds and we're obviously prepared to consider further sales in the future," the official said.

There were renewed calls for the US to help Taipei update its fleet last week after two Vietnam War-era jets crashed, killing all three pilots.

A US congressional source said Friday that Washington has decided not to sell Taiwan F-16 C/D, the improved version of F-16 A/B now serving the Taiwanese air force, for fear of upsetting Beijing.

But the source said Washington will help Taipei upgrade what the source said is 146 US-made F-16 A/Bs to the F-16 C/D levels.

Taipei applied in 2007 to buy 66 F-16 C/D fighters, which have better radars and more powerful weapon systems, in response to China's growing military muscle.

Washington recognizes Beijing rather than Taipei but remains a leading arms supplier to the island.

Ties between China and Taiwan have improved since Ma Ying-jeou of the China-friendly Kuomintang party came to power in 2008 on promises of ramping up trade links and allowing in more Chinese tourists.

But Beijing has refused to renounce the use of force against Taiwan even though the island has ruled itself for more than six decades since their split in 1949 at the end of a civil war.

The US official sought to counter any impression Washington was going soft on supplying Taiwan with weapons.

"First the US is profoundly committed to peace and stability across the Taiwan Strait and that commitment remains unwavering. Second, the scale and pace of defense article sales to Taiwan over the last two years is unprecedented," the official said.

"Weapons sales to Taiwan since 2009 will be greater than in the previous four years and they will be double the sales that occurred between 2004 and 2008."

US Air Force vows to spare F-35 from budget cuts

The US Air Force vowed Monday to "protect" costly weapons programs despite budget pressures, saying the country needed the F-35 fighter jet, a long-range bomber and other aircraft.

While acknowledging the need for reductions to the defense budget, Air Force Secretary Michael Donley proceeded to list several big ticket programs that were not up for negotiation.

"There are certain capabilities we will protect. We will apply best military judgment to oppose reductions that would cause irreparable harm," Donley told retired members of the Air Force in a speech.

The firm line taken by Donley comes as the Pentagon seeks to fend off possible deep budget reductions by lawmakers. Congress has to find a way to trim the country's deficit by a November 23 deadline or else automatic cuts will be triggered that could derail the Pentagon's budget plans.

With an aging fleet of fighter planes, it was crucial to build the next generation combat aircraft, the F-35 Joint Strike Fighter, to ensure US air superiority, Donley said.

"With a fighter fleet now averaging 22 years old and with two decades of declining fighter force structure, modernizing our aging and smaller fighter force depends on the fifth generation capabilities of the Joint Strike Fighter," Donley said.

"Simply put, there is no alternative to the F-35 program. It must succeed," he said of the aircraft, which has been plagued by cost overruns and delays.

The F-35 has come under growing scrutiny amid speculation that the Pentagon may be forced to downsize the program, including possibly eliminating a version of the plane designed for short takeoffs and vertical landings.

The civilian head of the Air Force also argued for maintaining funds for a planned long-range bomber, space satellites, nuclear forces, unmanned robotic aircraft and benefits promised to service members when they joined.

Donley said that budget reductions would require the Air Force to accept "greater risk in some areas, terminate some lower priority programs, streamline others," but did not provide details.

In his speech to the Air Force Association, Donley also said that within 10 years the force could be "potentially smaller than in previous decades" but did not offer an estimate.