Which lines from "The Star-Spangled Banner" convey a feeling of suspense about what happened after the battle?

I'm gonna go with: What is that which the breeze, o’er the towering steep,

As it fitfully blows, half conceals, half discloses?

Now it catches the gleam of the morning’s first beam,

In full glory reflected now shines in the stream,

’Tis the star-spangled banner - O long may it wave

O’er the land of the free and the home of the brave!