The problem for Israel is that our antiquated and politically influecned FMS contracting process has sometimes slowed weapons delievery given it is tied to political decisions which ensure that what DC political leadership wants is what they get.

“US defense and air industry sources report that the Israeli Air Force may give up on the US Boeing’s KC-46A Pegasus as its future refueling tanker for long-range flights because of delays in its delivery. Israel had first planned to take the Pegasus to replace its converted Boeing 707 when delivery was first to the US Air Force was scheduled for August 2017. But this week, the company put the date back by another eight months and the price increased by half a billion dollars.
American sources point out that if Israel wants to retain the option of attacking Iran’s nuclear facilities when Barack Obama exits the White House in January 2017, it can’t wait for the brand-new US Pegasus tanker, which doubles as a military transport plane, to come off the Boeing production line and be delivered to its air force. The Boeing 707 in current service, after a multibillion investment in its conversion to a long-flight refueling tanker, no longer meets the fluctuating conditions in the Middle East. Work is therefore going ahead on the conversion of the Boeing 767 as its replacement.”

http://www.debka.com/article/24799/Israel-is-working-at-speed-to-convert-Boeing-767-into-a-long-flight-refueling-tanker

On 24 JUL 15 NEC-SE posted the article: Iran buys 100 Russian refueling aircraft extending its fighter ranges to 7,300 KM.  In the posting we stated: “A day after the UN Security Council unanimously approved the Iranian “Nuclear/Economic Deal” Russia began the arms race in the region.”

On July 22, DEBKAfile’s military sources revealed a mammoth transaction for Iran to purchase Russian UL78 MK1 (Midas) tankers with a range of 7,300km. (The distance from Iran to Israel is 1,200km). Each tanker is capable of spontaneously feeding 6-8 fighter craft.

http://nec-se.webbar312.net/2015/07/24/iran-buys-100-russian-refueling-aircrafts-extending-its-fighter-ranges-to-7300-km/