I currently believe that the speed of light cannot be achieved. Even light itself is not as fast as the speed of light. Technically, a photon gains some mass as it has speed, although it is extremely small, and as things with mass get closer and closer to the speed of light, their mass gains because of the energy, and gains infinite weight so that the speed of light cannot happen. To better explain this, think of a graph. The X-axis being matter, and the Y-axis being speed. Think of there being an asymptote somewhere on the graph. The mass can never reach that speed, but it can get very so close, even with a force being applied to the mass, that force would be converted to weight. any comments?