From the article:
"The event — held at the Arizona Cardinals' training facility on July 20 — featured members of the Cardinals’ cheerleading squad swabbing their shoes and cell phones to collect microbe samples later sent to a lab at the University of California Davis for analysis. Microbes are microscopic single-cell organisms that have existed for millions of years and are found just about everywhere on the planet."
Also some mention of out sampling the Space Station and other parts of the project.
See more about the project here.