     # read json data
     $.getJSON jsonFile, (data) =>
 
-      # DEBUG: USE THIS FOR NOW
       if data.metadata.known_transits
         @known_transits = data.metadata.known_transits
         @planet_rad    = data.metadata.planet_rad

    clickEvent = { event: 'tutorial-clicked', timestamp: (new Date).toUTCString() }
    @recordedClickEvents.push clickEvent
    @canvasGraph.marks.destroyAll() # clear previous marks
    @updateButtons()
    @launchTutorial()

  launchTutorial: ->
    if $('#graph-container').hasClass 'loading-lightcurve'
      @notify 'Please wait until current lightcurve is loaded.'
      return

      Subject.group = MAIN_SUBJECT_GROUP
      @Subject.next()

    # @noTransitsButton.show()

  #
  # END MARKING TRANSITIONS
