items on the shelves. it s finding and stocking them. supply chain disruptions have starved stores of staples, from the produce aisle to the paper products. at his grocery store in washington, d.c., roy rodman says it s never been so difficult. it could be a very stressful time if we weren t able to navigate or get the products, so we re triumphant in putting things on the shelf. reporter: food shipments have also hit a pothole. the nation s truckers tell cbs news they re operating with 80,000 fewer drivers than needed. even a shortage in packaging items from cardboard adhesives to ink for product labels could snarl production. does this problem of unstocked shelves in certain stores last as long as the variant does, the pandemic does? yeah, it really does. and we ve seen it ebb and flow with past spikes. this one s a little bit more challenging because of transmibility of the omicron variant. reporter: and it s challenging for shoppers, like