WASHINGTON (AP) — New airplanes are grounded, investigations of fatal air and car crashes are going undone and scientific studies dependent on government funding have ground to a halt because of the partial government shutdown now in its second week, the Senate Commerce Committee was told Friday.

The economic impact will only intensify as the shutdown continues, affecting everything from the aviation industry to Alaska crab fishermen who may see their lucrative, one-month harvest delayed, witnesses told the panel.