anchor.diff:                                    .attr("class", function(d) {
   
                                       if (d.impact_prob_float == null) {
  -                                      return "asteroid unknown-danger";
  +                                      return "asteroid";
                                       } else if (+d.impact_prob_float <= 0.0) {
                                         return "asteroid";
                                       } else if (+d.impact_prob_float > 0.0 && +d.impact_prob_float <= 0.00001 ) {
  
positive.code:     window.danger();
    <% elsif @filter_type=="size"  %>
      asteroidSortingDimension = size;
      window.filter([[3500,10000],null,null,null]);
    <% elsif @filter_type=="near"  %>
      asteroidSortingDimension = close_date;
      window.flyby();
  
negative.code:     }
      else if( num == 2 ) {
        asteroidSortingDimension = size;
        window.filter([[3500,100000],null,null,null]);
      }
      else if( num == 3 ) {
        asteroidSortingDimension = close_date;
  