Take 1:
The US Special Envoy for Iran, Robert Mali: If Iran chooses not to return to the agreement, we will have to look at other options - diplomatic or not. If Iran is too close to a nuclear bomb, we will not be willing to to stand by and allow them.

Take 2:
Israel has asked the United States not to sign a partial nuclear deal with Iran.
The assessment in Israel is that the nuclear talks in Vienna will fail and that Joe Biden will not take military action against Iran.