Nobel laureates and other top scientists are imploring Donald Trump to keep the Iran nuclear deal intact when he becomes president.

In an open letter, 36 scientists — including one who helped design the first hydrogen bomb — asked the president-elect to preserve the deal, known as the Joint Comprehensive Plan of Action (JCPOA).

“The JCPOA does not take any options off the table for you or any future president,” the scientists wrote. “Indeed it makes it much easier for you to know if and when Iran heads for a bomb. It provides both time and legitimacy for an effective response.”