You can read the whole post on their blog. Below is an excerpt:
In the middle of the night, from my hotel in St. George, I made the call to the American Red Cross military assistance line. The American Red Cross worker compassionately asked me all the required questions. The American Red Cross worker also explained the next steps. The medical emergency needed to be confirmed with the hospital and then the American Red Cross contacted the military with our situation for their ultimate approval or denial.
Due to the work of the American Red Cross this request was processed quickly. Although responsible for a heavy mission workload, Zach’s command staff graciously approved his emergency family leave. Less than 2 hours from my call to the American Red Cross, Zach was on a helipad starting his rapid return to Colorado. Zach made it to Utah to spend quality time with his grandfather.