The US is expected to announce an arms deal with Saudi Arabia worth 60 billion dollars. It will be the largest ever sale of arms by the US which will include advanced fighter jets and military helicopters.After months of negotiations, the announcement is expected to be made in coming days. Off the record, US officials say the deal will include 84 new F-15 fighter jets and around 140 Apache and Black Hawk helicopters. The Obama Administration is unlikely to encounter opposition to the sale which will be projected as part of a strategy to bolster friendly Arab Governments in the face of growing strategic threat from Iran.