Distances are too great for any alien civilization visits to be possible without "breaking" laws of physics as we know them (wormholing through higher dimension).
If you're someone who enjoys reading about black ops and Cold War-era military projects, this is a pretty decent book to read.
I picked it up at the library, the majority of the book is about the U2 and SR-71 developments, along with some nuclear testing, but it does bring up Roswell at a few points and discusses what the author was told by "reliable" sources. You always need to take that with a grain of salt, but I enjoyed the read, no conspiracy tin foil hat theories. Quite sane, actually.
The founding of area 51 and the development of the U2 and SR-71 is pretty interesting. It doesn't mean you have to be a tin foil hat nut to enjoy the topic.
Distances are too great for any alien civilization visits to be possible without "breaking" laws of physics as we know them (wormholing through higher dimension).
Sorry, I should have been more specific - I meant the "tin foil" comment in regards to the sections about Roswell, what early responders thought were "aliens", etc.
Although the backgrounds of the U2 and SR-71 are fairly well documented at this point, it still made for some very interesting reading about the development of the planes, pilot casualties, and some of the capabilities of the planes.
Just wanted to say everyone believing the area 51 is the place where the most important researches are made and secrets kept just fell into the trap