President Donald Trump’s ‘Golden Dome’ missile defense project will require a whole-of-government effort on par with the Manhattan Project to develop the atomic bomb, according to a Space Force general. "This is on the order of magnitude of Manhattan Project, and it’s going to take concerted effort from the very top of our government. It's going to take a national will to bring all this together," Gen. Michael Guetlein, vice chief of space operations of the U.S. Space Force, told a gathering of defense industry experts on Wednesday.