The document summarizes the extensive bombing of Laos by the United States during the Vietnam War from 1964 to 1973, dropping over 2 million tons of ordnance including large numbers of cluster bombs. It notes that this bombing was a covert war not reported to the US Senate and resulted in unexploded ordnance (UXO) that continues to kill Laotians today, with estimates of 50,000-350,000 killed during the war and another 50,000 deaths since from UXO. In comparison, US contributions to UXO clearing in 2010 amounted to only $5 million or less than $1 per Laotian, while the bombing cost the US $57 billion and left 75% of the country