здравствуйте-может или нет родной дед из США, забрать родного внука из Москвы 21 года, по программе воссоединения семьи?

Я же вам написал ранее. . По программе воссоединения семьи это не получится.

The following classes of relatives are not eligible beneficiaries of an I-130 Petition for Alien Relative:
An adoptive parent or adopted child, if the adoption took place after the child's 16th birthday, or if the child has not been in the legal custody and living with the parent(s) for at least two years;
A natural parent, if the United States citizen son or daughter gained permanent residence through adoption;
A stepparent or stepchild, if the marriage that created the relationship took place after the child's 18th birthday;
A husband or wife, if you and your spouse were not both physically present at the marriage ceremony, and the marriage was not consummated;
A husband or wife, if you gained lawful permanent resident status by virtue of a prior marriage to a United States citizen or lawful permanent resident, unless:
A period of five years has elapsed since you became a lawful permanent resident; OR
You can establish by clear and convincing evidence that the prior marriage through which you gained your immigrant status was not entered into for the purpose of evading any provision of the immigration laws; OR
Your prior marriage through which you gained your immigrant status was terminated by the death of your former spouse.
A husband or wife, if he or she was in exclusion, deportation, removal, rescission or judicial proceedings regarding his or her right to remain in the United States when the marriage took place, unless such spouse has resided outside the United States for a two-year period after the date of the marriage;
A grandparent, grandchild, nephew, niece, uncle, aunt, cousin or in-law;
A husband or wife, if it has been legally determined that such an alien has attempted or conspired to enter into a marriage for the purpose of evading the immigration laws.

Пусть внук поедет туда по обычной туристической визе. А уж там дед подаст все документы в соответствующий департамент.

может! но по другой программе! главное туда уехать, а там всё проще!

Если такая программа есть в США, то может.

Шпаги звон, как звон бокала
С детства мне ласкает слух
Шпага многим показала
Шпага многим показала
Что такое прах и пух

Вжик вжик вжик
Уноси готовенького
Вжик вжик вжик
Кто на новенького?
Кто на новенького
Кто на новенького

мало того, вам туда и обычную визу получить не удасться теперь из-за деда