Who said "The serum was a success. But not in the way they expected."?

This quote is attributed to Captain America.

The serum was a success. But not in the way they expected. - Captain America

"The serum was a success. But not in the way they expected."

Captain America Science

"I can do this all day."

"When I first arrived at Camp Lehigh, I was just a scrawny kid from Brooklyn. But I learned that being a soldier isn't about size or strength."

"There are men laying down their lives. I got no right to do any less than them."

"I'm just a kid from Brooklyn. I can't do this."

"Science helps us understand the world."

"I've witnessed the birth of science, and it continues to amaze me."

"I'm something of a scientist myself."

"The fusion process is self-sustaining now!"