About 5,000 seniors from the University of Washington took a big step on Saturday. It was graduation day.

The commencement festivities were held at CenturyLink Field, because usual home Husky Stadium remains under construction.  EPA Administrator Lisa Jackson was the featured commencement speaker.

The ceremony, as well as a Mariners game going on next door at Safeco Field, combined to create gridlock on I-90 and and I-5.