Elon Musk has said that he's planning to launch two uncrewed BFR rockets to Mars by 2022. And of course there would be some test launches even before that. For such an enormous project, I don't see how this is even possible. Also, the Falcon Heavy got delayed for a long time due to unexpected engineering difficulties so I don't see why this shouldn't be the same. So what do you guys think is a reasonable expectation for the first launch of the BFR? I'm not saying first Mars mission, just first launch.