Phasing out the A-10 attack aircraft could cost Tucson 2,000 jobs — and that’s just one of many changes in store for Davis-Monthan Air Force Base, the proposed 2015 Air Force budget shows. If Congress approves the cuts, D-M would see ongoing — though, in some cases, diminished — missions including electronic warfare and unmanned aircraft operations. Among the proposed changes: •Most significantly, the base would lose its entire fleet of 83 A-10 Thunderbolt IIs by the 2019 fiscal year. •It also would lose seven EC-130H Compass Call electronic warfare planes by fiscal 2016. The base now operates 15 Compass...