"Rise in Home-Built Aircraft Linked to Fatal California Plane Crash"
A small home-built aircraft crashed off the California coast, with federal investigators believing four people were on board. The plane, a Cozy Mark IV, was constructed over nearly a decade and was registered to an Oakland-based company. The crash has raised questions about the safety of home-built planes, which have seen a significant increase in numbers over the years. The National Transportation Safety Board is investigating the crash, and a preliminary report is expected within 30 days.