President-elect Joe Biden has said he plans for the U.S. to re-enter the Iran nuclear deal he helped establish under the Obama administration in 2015. WSJ’s Gerald F. Seib explains why doing so won’t be as simple as it sounds. Photo: Abedin Taherkenareh/EPA/Shutterstock (Originally published Nov. 13, 2020) The Iranian nuclear scientist killed last week was ambushed in a remotely controlled operation, the country’s top security official said Monday, describing an audacious attack that Tehran has blamed on Israel. “The enemy used a completely new method, style and professional and specialized way to succeed in reaching its goal,” said Ali Shamkhani, secretary of Iran’s Supreme National Security Council, at the funeral procession for the scientist Monday. Israel…