Lewis and Clark's expedition was very long and expensive, although only one man lost his life. Many new things were discovered, including 178 new plants and 122 animals. The main objective was to discover a route to the Pacific Ocean, although Thomas Jefferson told them to note down anything important. It was also noted that mosquitoes were a major problem for the expedition. They came across many Indian tribes, only two Indians were killed and there was the first incident that caused the attack. They even traded or purchased supplies from many tribes, and a Shoshone girl, Sacagawea, aided them in their expedition. He would help lead the expedition, cook, set up and take down a Teepee every day. Also from the Indian tribes they brought a Giardoni-type compressed air rifle, which could kill a deer. It fired .46 caliber pellets with the energy of a modern .45 ACP (automatic Colt Pistol, like the guns used in World War I and II) bullet fired from a pistol. He had a flask that contained enough air for 30 shots and the gun held 20 pellets. It was recharged by tilting it upwards. Although Fr...