Torino scale the validity and societal impact of SETI data. The Torino Scale also uses a color code scale: white, green, yellow, orange, red. Each color code has an overall meaning: No object has ever been rated above level 4. The Chicxulub impact, believed by most scientists to be a significant factor in the extinction of the dinosaurs, has been estimated at 100 million (10) megatons, or Torino Scale 10. The impacts which created the Barringer Crater and the Tunguska event in 1908 are both estimated to be in the 3–10 megaton range, corresponding to Torino Scale 8. The 2013 Chelyabinsk meteor
Judo in the United States Many servicemen picked up martial arts during the war and returned home to teach them all across the country. The official judo federations formed in the 50s and 60s. The United States is not a major power in judo. Judo in the United States There are three main organizations that govern judo in the United States. The United States Judo Federation (USJF) started in 1952. The concentration of the USJF is on the east and west coasts, but also in Chicago and Hawaii. The United States Judo Association (USJA) was founded in 1968 as an extension of the Armed Forces