Source: https://citicards.citi.com/usc/Travel/AA/2017/May/GA/Exec/50k/default.htm?BTData=Ohg.B.gAB4f.J.BrD.SBoL.c91.kCx.vGZ.Bj.D.v5.E&ProspectID=CB605BA740F740CA8B0E0A02A84D7D55