Women are nearly half America's work force, and three quarters will be pregnant at least once during their working lives. When UPS driver Peggy Young became pregnant, her doctor told her not to lift packages weighing more than 20 pounds. But UPS refused to accommodate her. She had to take unpaid leave, lost her medical coverage — and sued for damages. Lower courts have disagreed about the federal Pregnancy Discrimination Act, and today the US Supreme Court agreed to decide if pregnant workers are entitled to special accommodations — just like employees who are injured on the job. Many companies — small and large — call that an expensive burden that discourages the hiring of women. Women's groups, evangelical Christians and the Obama Administration call it a violation of equal rights. We hear about today's arguments.