SAN FRANCISCO (AP) — Carl Djerassi, the chemist widely considered the father of the birth control pill, has died.

The auto industry's air bag troubles deepened on Saturday as U.S. federal safety regulators said three big automakers will recall about 2.1 million older vehicles to fix defects that could cause air bags to deploy when they are not supposed to. The vehicles involved in the recall announced by the U.S. National Highway Traffic Safety Administration are made by Toyota Motor Corp, Fiat Chrysler Automobiles NV and Honda Motor Co. There have been about 400 reported cases of inadvertent air bag deployments in the recalled vehicles, NHTSA Administrator Mark Rosekind said. The recall concerned a defective chip in air bag systems and the fix involved replacing the entire air bag module, including circuits manufactured by parts maker TRW Automotive Holdings, Rosekind said.