In defending the nuclear deal reached with Iran in Vienna today, President Barack Obama said that the agreement cut off Iran’s path to a nuclear weapon. In fact, it does the opposite. The deal makes it far easier for Iran to develop nuclear weapons for four basic reasons. First, it allows Iran to continue hiding much of its nuclear research. Second, its main restrictions last for only eight years. Third, it lets Iran continue developing ballistic missiles. And third, it provides billions of dollars in sanctions relief that Iran will use to further its nuclear aims.