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Hi, it's Celia Hatton here from the Global News podcast.

As the United States celebrates its 250th anniversary,

we've teamed up with our sister podcast, The Global Story,

to answer your questions about America's impact on the world.

It's a great listen.

This episode is part of a special series the Global Story has been doing,

as host Asma Khalid explains.

To hear more episodes, search for The Global Story,

wherever you get your BBC podcasts.

This week, as the United States celebrates 250 years since its founding,

we here at the global story have been marking the moment too,

with a very special series exploring the surprising and often hidden ways

that the United States has shaped the modern world.

Is the world a better place for having the United States in it?

Interesting question.

I think I have to have enough pride in my country to say yes.

I feel like the American dream is alive but not well.

I believe that future historians will look back at this very time

and conclude that it was the beginning of the end of American Empire.

The change is happening in China's economy represent a real threat to the United States's

geopolitical hegemony.

...