Government Officials Deny Whistleblower Claims of Recovered Alien Spacecraft

A decorated veteran claims the government has recovered alien spacecraft and has covered it up.
NASA denied the claims but said they are exploring space to determine if we are alone.
The Pentagon denied claims of a secret program to retrieve crashed UFOs and use their technology.
An official said his office is investigating over 800 cases but few are truly unidentified.
Though the claims spread quickly, there is no evidence to support them.