DETROIT (AP) — National Highway Traffic Safety Administration chief David Friedman says General Motors had information connecting defective ignition switches to the failure of air bags to deploy, but the automaker didn't share than information until last month.

Friedman is expected to testify today before House subcommittee members who want to know why neither GM nor the safety agency moved to recall millions of cars with defective switches when GM learned of the problem as early as 2001.