Kenton Grua
... that in 1977, Kenton Grua was the first person in recorded history to walk through the entire length of the Grand Canyon ?
... that in 1977, <b id="mwAhY"><a href="./Kenton_Grua" id="mwAhc" rel="mw:WikiLink" title="Kenton Grua">Kenton Grua</a></b> was the first person in recorded history to walk through the entire length of the <a href="./Grand_Canyon" id="mwAhg" rel="mw:WikiLink" title="Grand Canyon">Grand Canyon</a> <i id="mwAhk">(pictured)</i>?