An accident report says the cargo of a United Parcel Service plane that caught fire and crashed last year in Dubai included lithium batteries that weren't declared as hazardous cargo, according to AP.The report was released Sunday by the Dubai government's civil aviation authority. It paints a harrowing picture of two pilots struggling desperately to land their plane. It says the pilots ran out of usable emergency oxygen, so the captain left the cockpit to find portable oxygen canisters. He apparently never returned. Smoke was so thick in the cockpit that the first officer couldn't see his flight instruments or change radio frequencies. The report is expected to raise questions about the safety of air shipments of the batteries, which are the focus of an intense lobbying battle in Washington.