What in the article's facts - real facts from real sources - are sufficient evidence for these editorial statements by the author:
"The Department of Defense is slamming the door on questions about the mysterious contrail "If the author, F. Michael Maloof, can't back this up, his editor should strike them from the article." the refusal to provide answers to specific questions suggests a cover-up of potential secret missile testing in the area "
Yes, he should.
Are you kidding? This is WND we're talking about. The editor probably put those in.