Bill Nelson actually said...

"The ISS is the only laboratory of its kind."

"Ranking Member Vitter and distinguished members of the Subcommittee, thank you for the opportunity to speak to you."

"Well, Dr. Katz, I come back to you. Picking up on the idea that you talked about of the ISS as a National Laboratory."

"Thank you for the opportunity to speak to you on the benefits and applications of space based research."