I, ______________________, understand that if I am issued a visa, I am required to display and surrender my visa to the United States Immigration Officer at the port of entry where I apply to enter the United States and that possession of a visa does not entitled me to enter the United States if, at the time, I am found ineligible under the immigration law.
bla bla bla .....
I do affirm, that if admitted to the United States, I will not engage in activities which would be prejudicial to the public interest, or endanger the welfare, safety, or security of the United States; in activities which would be prohibited by the laws of the United States relating to espionage, sabotage, public disorder, or in other activities subversive to the national security; in any activity the purpose of which is the opposition or the control or overthrow of, the Government of the United States, by force, violence, or other unconstitutional means.
or I get the boot and sent packing ...