By Andrea Shalal WASHINGTON (Reuters) – The U.S. Air Force plans to request initial funding for three surveillance satellites to track objects in space as part of its fiscal 2016 budget request, a top Air Force general said Tuesday. General John Hyten, head of Air Force Space Command, told the annual Air Force Association conference the satellites would be a relatively inexpensive follow-on to the Space-Based Space Surveillance (SBSS) satellite built by Boeing Co. …