After Challenger NASA was pretty much ordered out of the commercial launch business, and the Shuttle was only used for missions that absolutely required it. Which meant spacecraft that were already designed for shuttle launch. Since Columbia NASA has been removing those too. The simple answer to our simple minded questioner is: the same way as they have been doing for the last 20 years, plus the same way as they did five years before that, and the same way as every other nation has always done it.