But forty years later, "Sesame Street" is the longest running children's television program in the United States.

VOA: special.2009.11.27

Today,the research program at Gombe represents one of the longest continuous wildlife studies in the world.

VOA: special.2009.11.18

A lot of people feel uneasy about spending after the longest recession since World War Two.

VOA: special.2009.08.21

Its creators said it is the longest chemically designed DNA structure ever produced in a laboratory.

VOA: special.2010.07.20

That is the longest period in United States history that the flag has remained unchanged.

VOA: special.2010.04.02

The many pins take the shape of one of the longest rivers in the world.

VOA: special.2009.05.06

"Atlas Shrugged" is more than one thousand pages, one of the longest novels ever written.

VOA: special.2010.06.06

The longest inaugural address on record was given by William Henry Harrison in 1841.

VOA: special.2009.01.19

At the time, it was the longest suspension bridge in the world.

VOA: special.2009.03.04

It was the longest strike and boycott in United States labor history.

VOA: special.2009.09.06

Sometimes we'd have that whole river to ourselves for the longest time...

VOA: special.2010.03.21

And the longest repayment period will be shortened from twenty-five years.

VOA: special.2010.04.15

It is still the longest-running musical play in the world.

VOA: special.2010.05.24

But I also know that we've got a long way to go to fully restore our economy and recover from what's been the longest and deepest downturn since the Great Depression."

VOA: special.2009.10.30

They would make the longest, most difficult flight ever.

VOA: special.2009.07.01

The longest of these bridges is eleven kilometers long.

VOA: special.2010.03.22

It would be the longest, most difficult flight yet.

VOA: special.2009.06.24

Cayuga Lake is the longest among them.

VOA: special.2009.01.05