article_snippet: The National Park Service had posted signs at the site two days earlier warning hikers that a fissure along the top of Arch Rock may have weakened the cliff and that walking along the edge was dangerous.
article_snippet: It was clear no one should be on Arch Rock with the huge fissure,' Karen Blasing said. '
article_snippet: We stayed back, but many others were unconcerned and dangerously taking chances.'
article_snippet: The area leading up to Arch Rock is closed for your safety,' a message read. '
article_snippet: The land may still be unstable and further collapse or erosion could occur.'
article_snippet: the National Park Service put up signs days earlier that warned about a fissure, seen in this undated photo, along the top of Arch Rock that could have weakened the cliff .
highlights_snippet: The National Park Service had warned visitors about a fissure that had opened up on Arch Rock, possibly weakening the cliff .
  