Repairing laminate countertops; rebuilding a brick walkway

In the ASK THIS OLD HOUSE loft, general contractor Tom Silva shows host Kevin O'Connor how to repair damaged laminate countertops. Landscape contractor Roger Cook helps a homeowner rebuild a brick walkway. Back in the loft, Tom, Kevin, Roger and plumbing and heating expert Richard Trethewey ask, "What is it?" Then, Richard shows Kevin different types of filters for forced-air heating and cooling systems.