Original sentence: And currently it is un-clear how many handreds Sukhoi PAK FA and J-XX will be built.China is also developping 5th generation twin-engine J-XX stealth fighter,it estimated to equip improved AL-31 or Chinese copy WS-10.Corley wrote to Senator Saxby Chambliss that "To my knowledge, there are no studies that demonstrate 187 F-22s are adequate to support our national military strategy," "(a limit of 187 F-22) puts execution of our current national military strategy at high risk in the near to mid term",and wrote"(reserch)shows a moderate risk can be obtained with an F-22 fleet of approximately 250 aircraft" airfoce reports 381 F-22s will be necessary.In 2009, Novosti informed that Russia will start flight test of their 5th generation twin-engine stealth fighter Sukhoi PAK FA end 2009, it is planned to be deployed by 2012(but may be delay few years).While the House Armed Services Committee inserted $368.8 million in the budget markup as a down payment for a further 12 F-22s in FY 2011
Edited sentence: Corley wrote to Senator Saxby Chambliss that a limit of 187 F-22 "puts execution of our current national military strategy at high risk in the near to mid term"  While the House Armed Services Committee inserted $368.8 million in the budget markup as a down payment for a further 12 F-22s in FY 2011