Like most adoptive parents, you may not be able to spend two years abroad living with the child. Therefore, you can seek benefits under Section 101(b)(1)(F) of the INA, which grants immigrant classification to orphans who have been adopted or will be adopted by U.S. citizens.
Under this section of the law, both you and need to meet a number of requirements established by the INA and the related regulations, but the two-year residency requirement will be eliminated. Only after you can prove both the child and you qualify, can the child be issued a visa to travel to the United States.
Keep in mind, however, Section 101(b)(1)(F) of the INA does not provide exemption if the country in which you are adopting has a residency requirement.