Seeing walls of sand on the beach in front of the Hotel Del Coronado? They're not the work of amateur sand castle builders, here's why city crews are putting them up.

Rain, winds and high tides destroyed the wall of sand that cost over half a million dollars to create. The new sand is bringing back that protection, something neighbor Ray Champagne is grateful for.

Former Commander of US Pacific Command, Admiral Harry Harris once referred to this as the "Great Wall of Sand" - a "nine-dash line" creating a protective ring and supply network around Chinese ...