There are numerous and consistent indications that the US Government has made a secret agreement with the Greys, and some other alien species. It is not clear when this would have happened. Several sources mention that in 1954, probably on 20 February, the Greys would have landed at Edwards Air Force Base, and met with President Eisenhower. Other sources however mention 24 April 1964, and a landing at Holloman AFB (See: Holloman Landing).
According to the agreement, the US Government would allow people to be abducted on the condition that they would not be harmed, that they would be returned safely and that they would not remember the incident. In exchange, the US Government would get highly evolved technology. Another part of the Edwards Agreement was the exchange of "ambassadors." One of the by now famous ambassadors was the reptilian ambassador Crill, from Tiphon in Draco. Another one is often called J-Rod.
The Edwards Agreement was the culmination of a chain of events that started on 5 July 1947 when debris of a crashed alien spacecraft was found in Roswell, New Mexico, and several alien bodies, of Greys, were found. When another spacecraft crashed in 1949, again in New Mexico, there was a survivor, who was given the nickname EBE, short for extra-terrestrial biological entity. With information provided by EBE, the US Government was able to contact the Greys in 1951, and in 1952 official communication channels were opened, which would lead to the treaty in February 1954.
When the alien craft landed in February 1954, an unsuspecting test audience of several hundred soldiers was present. The US military wanted to know how people who were not prepared would react to being confronted with reptilian aliens that have technology that by far surpassed ours. The results were rather disastrous, as soon afterwards a vast majority started displaying dysfunctional behaviour, ranging from criminal behaviour to depression and psychosis. (Interestingly enough, in the so-called Brookings Report, discovered by Professor Stanley McDaniel, the Brookings Institute, in 1961 warned NASA that it would be better to withhold any information about alien civilisations from the public because "Anthropological files contain many examples of societies sure of their place in the universe, which have disintegrated when they had to associate with previously unfamiliar societies espousing different ideas and different life ways.").
PS: Bill Cooper claims this meeting took place at Holloman Air Force Base, instead of Edwards Air Force Base. Other sources mention subsequent meetings that took place at Holloman AFB.
PS2: Michael Salla claims that on 20 Feb. 1954 Eisenhower did meet aliens: he didn't meet the Greys, but the Blonds/Nordics, and they tried in vain to dissuade the US Govt. from entering an agreement with the Greys. (Several sources mention that the Blonds that came to warn about the Greys came from Epsilon Eridani).
PS3: Dan Burisch claims the official namefor this treaty is the Tau IX Treaty for the Preservation of Humanity. No other sources mention this.