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This is the moment a White House spokesperson dodges a question about the Roswell incident - only to be warned: "You're not going to get off easy like that."

White House press correspondent April Ryan quizzed press secretary Josh Earnest about the famous incident during a media briefing.

It is the second time the spokesman has come under fire from reporters about UFOs in a week.

Another White House correspondent, Mark Knoller, had earlier asked Earnest about Area 51 and whether Barack Obama would "beat Hillary Clinton to the punch" by revealing America's secrets about extra-terrestrials.

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The questions follow weeks of publicity of the Democratic presidential candidate's pledge to release Government-held UFO files, if she wins the election in November.

(Image: WH.GOV)

Earlier this month, MSNBC's Andrea Mitchell also asked Hillary Clinton's spokesman Brian Fallon about her being declared the "first ET candidate."

Ryan, who is also Washington bureau chief for American Urban Radio Networks, asked Earnest: "There’s this increased interest in Roswell. You’re doing your dance at the podium about it. Is there a such a thing?

"Are you keeping quiet because of security concerns? Are we to think that there might be life beyond here? You need to answer this."

(Image: WH.GOV)

Earnest, appearing nervous and drinking water after being put on the spot, replied: "I’ll just say, April, there are some questions that even the White House Press Secretary doesn’t have answers to, and this is one of them."

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Unhappy with his response, she hits back: "You’re not going to get off easy like that."

The Roswell incident happened in July 1947 when a 'flying saucer' allegedly crashed in the New Mexico desert.

Witnesses claim the military recovered the wreckage and alien bodies but the US Airforce said it was a weather balloon with crash test dummies on board.

(Image: Getty)

Stephen Bassett, America's only lobbyist on the ET/UFO issue, believes President Obama is on the brink of telling the world the truth.

He told Mirror online: "When Andrea Mitchell and April Ryan pressed the White House Press Secretary Josh Earnest for comments on the breaking story about the Clinton/ET/Disclosure/Rockefeller Initiative connection, a milestone was reached.

"This campaign issue is now publicly seen as inside the White House. Almost certainly more questions will be raised in the West Wing in the coming weeks."

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Grant Cameron, an expert on US presidents and UFOs, said: "For the third time in a week the White House is asked if the ET story is for real.

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"The last time this happened was in 1997 when Bill Clinton's aide Webb Hubbell put out his book 'Friends in High Places' and then you have to go back to 1954 with President Eisenhower.

"The blood is in the water and the reporters have started to circle. These questions go to confirm that the president is the Wizard of Oz behind the cover-up."