Should I send a second interview thank you?

I sent a thank you email after my first email but never got a response back. But then got a call for a second interview.

I was interviewed by the same guy as last time, and one new person.

Should I send them both one? The new guy isn’t my director, he just works closely with my position.

usa jobs
usa jobs resume
usa hotel jobs
usajobs
usa jobs federal government
usa job in ksa
usa jobs
usa jobs login
usa jobs gov
usajobs.gov
www.usajobs.gov
usajobs.com
usajobs
usajobs.gov official