In 2002, Chuck Frederick wrote a piece in the Duluth News Tribune titled "Visitors from the Beyond." Below is the part related to 1965.

UFO about 100 feet across
The Date: Feb. 13, 1965

The Incident: University of Minnesota Duluth instructors Donald Jackson and Bill McEwen, as well as McEwen's wife, were on their way to the state curling matches in Hibbing when they saw an unidentified flying object in the night sky. 

About 100 feet across and descending, the object was about five miles east of the Hibbing-Chisholm municipal airport, off Minnesota Highway 37. 

The Duluthians reported what they saw to the airport's flight service station, which notified the air base in Duluth. 

The Freaky: A highway patrol officer from Walker reported a similar object within half a minute of the instructors' report. 
    
Boy spots buzzing red ball
The Date: Aug. 4, 1965

The Incident: Already in bed, 8-year-old Dennis Johnson of Duluth suddenly bolted upright at the sound of a loud buzzing. 

"I went to the window and saw a red-ball-like thing over the neighbor's house," the boy told a News-Tribune reporter. The object made a whirring sound and headed toward Superior Street. 

"On the back of the red ball was a flap-like tail that was silver and glowed," the boy said. 

He called for his father to look out the family's front window, at 1722 Jefferson St. James Johnson told reporters he didn't see anything but said he heard a car "with a different kind of muffler." 

The Freaky: More than 50 Minneapolis police and Hennepin County sheriff's officers reported UFOs over the Twin Cities the same night, according to Associated Press reports. The next day, an Air Force spokesman in Washington, D.C., said a variety of meteoric showers were probably to blame for the rash of sightings. 

An official denial
The Date: Aug. 5, 1965 

The Incident: Duluth Air Base officials publicly denied their planes had taken off to look for flying saucers. 

The Freaky: Although sightings had been reported in the Midwest and in the Southwest, reports of UFOs in the Duluth area hadn't been recorded until after the air base's official public statement. 

Retired Brig. Gen. Raymond T. Klosowski, the former commander of Duluth's 148th Fighter Wing, said this month that such denials were common for the air base back then. 

"There was no standard policy, but it happened often enough," he said. 

Aircraft from the base were scrambled, or sent into the air, on UFO calls one or two times every three or four years, Klosowski said. 

"Most of the time the calls could be explained," he said. "One time we chased a weather balloon. The sun was reflecting off it. But it was moving so slow, it was easy to catch. 

"I only had one scramble like that myself," Klosowski said. "That turned out to be a goofy reflection off a lighthouse in Ashland. 

"A lot of pilots, when they went on calls like that, they were real reluctant to get into the newspaper," he said. "No one wants to be in the paper for something like that."
    
'There it is!'
The Date: Aug. 6, 1965 

The Incident: Breathless, a Superior man called Coast Guard officials just after midnight. He had seen a UFO splash into the water near the former Interstate Bridge. The craft was underwater, the man said. He could see it. He offered to take authorities to the exact spot. 
    
They went, according to reports in the morning News-Tribune. 
   
"There it is!" The unidentified Superiorite shouted, pointing at the water. 
    
The Freaky: "He was the only one who could see anything," a Coast Guardsman said. 
    
Later in the day, Duluth air base officials termed recent reports of UFOs "unqualified." They denied Air Force planes were scrambled to look for saucers. Temperature inversions reflect radar beams and produce radar returns similar to an actual object, one air base official said, explaining blips that had been spotted on radar screens and reported. 
    
News pages now missing
The Date: Aug. 7, 1965

The Incident: Thousands of Duluthians stood in the streets and gawked as air base planes vainly chased unidentified flying objects across Lake Superior, according to newsman Frank Edwards's 1966 book "Flying Saucers -- Serious Business."
    
The UFOs, as many as 10 of them, flew in a V-formation at about 9,000 mph, according to United Press International, which cited the Air Force Radar Base in the Keewenaw Peninsula of Michigan as its source. 
    
The Air Force planes couldn't keep up and were easily outdistanced, the reports said. 
    
The next morning, news of the UFOs and of the Air Force's unsuccessful chase dominated the front page of the Duluth News-Tribune. A headline screamed, `Thousands See Flying Objects -- Jets Chase UFOs Over Duluth Area.' 
    
The Freaky: That front page of the News-Tribune is now missing from the microfilm archives not only in the newspaper's library, but in the main Duluth Public Library and at the library at the University of Minnesota Duluth. 
    
But that happens from time to time, right? 
    
"That's the first time I've ever seen it," UMD business reference librarian Jim Vileta said. "The men in black are probably involved here. They must have taken the page."
    
There's probably a more logical explanation. The microfilm reels at all three libraries were produced by the same ProQuest Co. of Ann Arbor, Mich. A ProQuest spokesman said it's rare for a page to be missed, but does happen. In this instance, the mistake was likely reproduced for all three customers. 
    
The coincidence that the missing page just happens to be the one containing the story of the UFO sighting fuels suspicions of conspiracy. Duluth video producer Don Hansen searched for the front page back in 1987. 
    
"From what I can gather, this was a major sighting. But it appears to have been expunged from the record," Hansen said. "That page is gone from every single source I could think of. They were thorough, whoever 'they' are."

More UFO stuff:

Nov. 2, 1914: Reports of UFO sightings over Duluth

July 29, 1968: Duluth UFO researcher testifies before congress