it doesn't
Niagara Falls is a bit difficult to get over in a ship.
The Atlantic Ocean
Atlantic Ocean !
Manifest destiny
Manifest destiny
manifest destiny
"Manifest destiny"
"Manifest destiny"
It was not the Atlantic that was their destination, they were to cross and explore the Louisiana Territory and reach the Pacific Ocean, which they already knew existed. And yes, they did successfully reach the Pacific and make a successful return home.
manifest destiny
manifest destiny
Atlantic ocean