Hi! I am flying into JFK from LHR and will obviously do customs and border control there. I am then getting a totally new flight on a seperate ticket from JFK to Atlanta, where I am then getting a connecting flight from Atlanta to Lexington bluegrass. I only have 30mins from when I land in Atlanta to get on my connecting flight. Is this achieveable? What security will I then have to go through when I arrive? (As I will have already done customs etc at JFK). All my flights are operated by Delta. Any info about what terminals I need to get to and from and security information would be much appreciated.