Just to clarify, Whopper....you CAN get licensed in at least 8 U.S. states after completing only 1 year of residency training (this is true for U.S. and IMG physicians). I should know, as I am licensed in two of them.
Apart from special faculty permits, using the
AMA's info, I counted five that only require one year of US GME for IMGs;
Alaska, Arkansas, Iowa, Rhode Island, Wisconsin
The following states require two years for IMGs;
Connecticut, Florida, Hawaii, Illinois, Indiana, Kansas, Kentucky, Maine, Michigan, Minnesota, New Hampshire, New Mexico, Ohio, Oklahoma, South Dakota, Utah, Virginia, Washington
The remainder require three.
But independent practice, hospital priviledge committees and insurance companies may well require board certification.