reporter: the fed s challenge, hitting the brakes on the economy without sending it into recession tom, meantime, diesel fuel prices have hit an all-time record high. what s behind that yeah, $5.32 a gallon now analysts blame a shortage of refining capacity and the russian oil embargo. higher diesel costs mean higher shipping costs, which then sends prices even higher for food and everyday products. lester tom costello, thank you. up next, battling retail theft our investigation. why stores are turning to corporate cops to try to stem the surge.