From
http://www.sfgate.com/crime/article/...g-12237571.php
The 49-year-old San Francisco Police Officer who was stabbed in the leg at the airport this week is “in great spirits and doing well,” police said Wednesday.
He was treated and released from a hospital on the same day of the incident, but officials said “his full recovery will take a while.”
As the original article states, it was a homeless person who was hanging around baggage claim.