Hundreds braved the wind and fog of San Francisco's Presidio to take part in a long-awaited groundbreaking for the 14-acre tunnel-top park. KCBS Radio's Tim Ryan has more. 

<p>Hundreds braved the wind and fog of San Francisco's Presidio to take part in a long-awaited groundbreaking for the 14-acre tunnel-top park. KCBS Radio's Tim Ryan has more.&nbsp;</p>

KCBS Radio: On-Demand

Today's news from KCBS Radio in the palm of your hand.

Advertisement