“We have only a two-day launch window available in May before we must clear the launch pad to allow for an on-time launch of the U.S. Air Force’s AEHF-5 mission,” Boeing said in a statement. “In order to avoid unnecessary schedule pressure, not interfere with a critical national security payload, and allow appropriate schedule margin to ensure the Boeing, United Launch Alliance and NASA teams are able to perform a successful first launch of Starliner, we made the most responsible decision available to us and will be ready for the next launch pad availability in August, while still allowing for a Crew Flight Test later this year.”