Three military witnesses will testify, under oath, to Congress next Wednesday that they have firsthand knowledge about UFOs.  

Air Force and intelligence agency veteran David Grusch — whose jaw-dropping claims of an illegal UFO crash retrieval program operating within the classified world were made public this June — will be among those giving sworn testimony. 

'We have three dynamite witnesses,' Congressman Tim Burchett said Tuesday. 

'They're professionals. They're military,' the Tennessee Republican noted. 'They're people that were there and saw what they saw.' 

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