If all goes smoothly – and it hasn’t so far -- Space Exploration Technologies or SpaceX will this month send its Falcon 9 rocket and Dragon space capsule into low earth orbit on the first public resupply mission to the International Space Station. The Dragon will stay about 18 days and deliver a little over 1,000 pounds of cargo. A successful mission will go a long way toward bolstering the idea of non-NASA spacecraft ferry equipment and ultimately astronauts to the space lab. It won’t be an easy task by any means. “This is a really tough flight. What we’re asking them to do is amazing,” NASA’s William Gerstenmaier said. Here we take a look at the components of this historic event.