CLEAN : Kerry says only fools would walk away from nuclear talks

The transcript discusses the progress made in negotiations with Iran regarding its nuclear program. It highlights the sanctions and financial benefits involved, the substantial progress in Vienna talks, and the importance of reaching the right agreement. The transcript also notes the rollback of Iran's nuclear program, marking a significant change from a year ago.

What does the speaker imply about the importance of reaching the right agreement with Iran?

What were the concerns regarding Iran's nuclear program one year ago?