WASHINGTON -- Relief for companies complaining of skyrocketing pension costs cleared another hurdle in Congress on Wednesday, with a Senate panel approving a three-year interest rate adjustment that would let businesses pay less into their workers' retirement plans. The bill passed the Senate Health, Education, Labor and Pensions Committee after a compromise was brokered last week between committee Chairman Judd Gregg (R-N.H.) and the top Democrat, Sen. Edward M. Kennedy (D-Mass.). Traditional pension plans have been hurt by a combination of low interest rates, the poor economy, stock market losses and an increase in retirees. Supporters fear that companies will...