NATIONAL HARBOR, MD -- A U.S. Transportation Command-led mobility and capability requirements study has been delayed until later this year as the Pentagon works to incorporate additional threat-based planning data into the scope of the review. The Pentagon launched the study -- aimed at helping the mobility community determine how many airlift and tanker aircraft and sealift ships are required to address combatant command requirements -- in March and was slated to complete it by the end of this month...