My interpretation of this statement is that the trial will start in September, not that the vaccine itself will be commercially available at that time. If the trial has sites in the United States, you can look those up on clinicaltrials.gov and also see the eligibility requirements. Remember that the trial will be placebo controlled and blinded so you won't know whether you got the placebo or the vaccine.
The FDA has issued a statement what they will require for full approval. The first vaccine widely available in the US will probably be for emergency use only and who would qualify or what the bar would be for emergency use approval hasn't been spelled out yet.