TC---just saw some info about the launch and the particulars. Really a lot more detail out there but they basically had a 5 minute window to launch. It has to do with the orbital plane of the ISS and catching up to the ISS. There is very little wiggle room and they have really made this a mission specific vehicle. It's not like the shuttle where they had lots of wiggle room with payload and fuel. The Dragon doesn't have the ability to have that luxury as it's much smaller. So, they launch and end up below and behind the ISS, it does a 180 and climbs and speeds up to catch the ISS. They even said they do some formation flying once they catch up. It's pretty impressive. They've taken years and years of experience and fine tuned it to make this rocket work. Can't remember the numbers exactly on the price to do it, but Space X was a lot cheaper than everyone else (Boeing, etc). You can look at the Shuttle as a Winnebago and the Dragon as a Ferrari. Here is a link for whoever is interested for more info....
https://www.avweb.com/multimedia/vo...second-launch-timing-is-a-must/?MailingID=355