While the U.S. waits for the Food and Drug Administration's decision to give Pfizer's COVID-19 vaccine emergency-use authorization, the wheels are already turning to roll out the vaccine almost immediately. The Pfizer plant in western Michigan said it's ready to ship 6.4 million doses within 24 hours of approval. Tanya Rivero spoke with CBS News transportation correspondent Kris Van Cleave about the steps being taken.