December 9th, 1976.

Pilot John Gliskey, and his co-pilot, John Nelson, have just crossed from Mexico into U.S. airspace, just south of San Diego.

They began their day in Vegas before flying south to a dirt runway in Baja.

Airplane's clean, speed's good, climb the pair. 3523.

3523, here we go.

The duo who were flying a converted World War II era Lockheed Loadstar, known as a Howard

500, make a B-line for the coast.

In previous times, the plane had settled business executives

across the country. Today's cargo was decidedly different. So they flew up to Santa Barbara.

They hung a right, which is now due north. The purpose was to fly toward just north of Carson City.

This is Rick Schloss, author and researcher who went to high school with Kliski.

And if you draw a line from about just north of, say, Santa Barbara or Ventura, to Carson City,

you're going to see that that line goes over the southeast end of Yosemite, where

Lorber Sett Pass Lake is.

Now over the Central Valley, and sparsely populated farmland, Glisky, who's flown helicopters

in the Vietnam War, knew what he was doing.

He'd flown hundreds of missions.

He cuts the navigation lights as darkness falls.

And so these guys don't want to be seen on radars.

They're used to flying below the radar with all their training in Vietnam.

The plane vanishes from prying eyes.

Radar in the 1970s wasn't nearly as sophisticated as today, so Glisky's got to disappear

...