washington unite state give israel 38 billion military assistance next decade large aid package u.s. history landmark agreement sign wednesday deal whose detail report reuters early allow washington chief middle east ally upgrade fighter aircraft improve grind force mobility strengthen missile defense systems senior u.s. official say package constitute u.s. military aid ever give country entail concessions israeli prime minister benjamin netanyahu accord officials side include israel promise seek additional fund congress beyond guarantee annually new package phase special arrangement allow israel spend part u.s. aid defense industry instead american-made weapons officials say nearly 10 months drawn-out aid negotiations underscore continue friction president barack obama netanyahu last year u.s.-led nuclear deal israel arch-foe iran accord israeli leader oppose unite state israel also odds palestinians right-wing netanyahu decide would best forge new arrangement obama leave office january rather hop good term next u.s. administration accord officials side new pact allow avoid uncertainties surround next president whether democrat hillary clinton republican donald trump give israel defense establishment ability plan ahead obama aid want new deal presidency end see important part legacy republican critics accuse attentive enough israel security white house strongly deny take hard line israeli leader 38 billion memorandum understand cover u.s. fiscal years 2019-2028 succeed current 30 billion mou sign 2007 expire end fiscal 2018 prime minister netanyahu confident new mou make significant contribution israel security remain dangerous neighborhood obama say write statement agreement sign state department u.s. undersecretary state thomas shannon jacob nagel act head netanyahu national security council accord white house fact sheet deal include -annual payments 3.3 billion so-called foreign military finance 500 million year israeli missile defense fund first time formally build aid pact -a phasing-out special arrangement decades allow israel use 26.3 percent u.s. aid defense industry instead american-made weapons -elimination longstanding provision allow israel use 13 percent u.s. aid buy military fuel -the fund allow israel update lion share fighter aircraft include purchase additional f-35 joint strike fighters israel schedule receive 33 f-35 aircraft first two deliver december u.s. israel sign 38 billion military aid package