Discovery’s final flight beginning of the end for shuttle

For nearly three decades, it has been centerpiece of our quest into space.

But only three months from now, it will no longer fly.
The space shuttle program is coming to an end. And for the moment, NASA has no new vehicle to carry astronauts into space.
That’s why the landing of the space shuttle Discovery Wednesday — was cause to pause and reflect.
Our Scot Urquhart did just that — with two experts who know the shuttle very well: