This is the analysis for the Peer Assignment 2 of Coursera Reproducible Research. The data was extracted from the U.S. National Oceanic and Atmospheric Administration's (NOAA) storm database. We want to know what is the harmful dister in the States. The analysis revealed that tornado is the most harmful with repect to the total population of fatalities and injuries. However, according to the economic damage cost, flood cause the most harmful effect