Did Planes really hit the WTC buildings on 9/11 or was it all (CGI) COMPUTER GENERATED IMAGES?

Look how the plane goes through the building (Vertical steel beams) with ZERO resistance and also just think of a planes WINGS that are BIG & HOLLOW yet we are to believe they SLICED through the VERTICAL STEEL COLUMNS of both WTC buildings like butter??? Those wings would stop DEAD IN THEIR TRACKS and then fall to the ground.
In my opinion, these 9/11 videos were made BEFORE the event with the best COMPUTER GENERATED GRAPHICS with EXPLOSIONS but it never looked REAL when you think that these buildings were not WOOD but strong VERTICAL STEEL COLUMNS for a 110 story skyscraper.
You can see the STEEL COLUMN BEAMS being put together on the WTC Buildings back in the 1970's as they filmed it being erected to give you an idea of the sturdiness of the building.

@1:40 mark is where you see the vertical metal beams installed.
Building the WTC twin tower 911 in 1970's
https://www.youtube.com/watch?v=aeAtwC4kWkU

John Lear's father is the designer of the Lear jet so knows a lot about the physics of planes.