Instant Index: Muhammad Ali's Condition Improving

David Muir reveals the stories people have been buzzing about all week.
0:47 | 12/23/14

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Transcript for Instant Index: Muhammad Ali's Condition Improving
To the index now, and a new development tonight. Four people including a delta employ yeel now accused of smuggling 18 guns onto a passenger plane, right in the cabin. Reportedly happened last week on board a plane headed from Atlanta to New York. It's under investigation. To what we're learning this evening about hue hall mad Ali. The 72-year-old was admitted to the hospital with pneumonia. Reports tonight have Ali vastly improving and, in fact, he may go home soon. And you remember the house from "Up" floating up into the air. Tonight, the real life version. Watch this. A dare level armed with 50 tanks of helium, 909 balloons and a lawn chair, lifting off. When he reaches 8,000 feet, popping the balloons with a rifle, hurtling to the ground at the speed that he controlled. That chute says it off. Rockstar. He stuck the landing, too.

This transcript has been automatically generated and may not be 100% accurate.

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