On Wednesday President Bush made a trip that no president has taken since 1979 — to one of the country’s nuclear power plants. Speaking at a plant in Maryland, Bush said, “It is time for this country to start building nuclear power plants again.” Jimmy Carter was the last president to step inside a plant under very different circumstances. In 1979 Carter visited Three Mile Island five days after the plant suffered a partial reactor meltdown in the worst nuclear accident in U.S. history. Carter visited the site with his wife Rosalynn in an attempt to demonstrate that the plant was safe. Since the Three Mile Island accident no new nuclear reactor has been approved in the country. But on Wednesday Bush repeated his call for Congress to change that, as he claimed that “Nuclear power is one of America’s safest sources of energy.”