Boeing expects to be on contract for the first block of KC-46 modernization work by the first quarter of 2021 -- the first phase of a 10-year, $5.7 billion post-production contract the Air Force awarded the company last year. Mike Hafer, senior manager of KC-46 business development at Boeing, told reporters this week the company is in negotiations with the service around the first block of Pegasus Combat Capability, or PC2, upgrades, but said the work centers around enhanced communications...