More than 50,000 Los Angeles county workers strike disrupting key services

Two-day walkout begins after contract negotiations fail amid unprecedented stresses' on county budget

More than 50,000 Los Angeles county workers were on strike again on Tuesday, closing libraries and disrupting administrative operations across the nation's most populous county.

The two-day walkout that began on Monday followed failed negotiations with the county for a new contract after the last one expired in March, according to the Service Employees International Union Local 721.