<p><span class="deck"> <span class="typestyle"> The river that disappointed him bears his name, but Alexander Mackenzie’s great achievement in slogging to the Pacific is now almost forgotten.</span> </span></p>
<p>Seventy-five years ago, the "first lady of the air" vanished over the Pacific Ocean while attempting to circumnavigate the globe. Today, there may be renewed hope of solving the mystery.</p>
