Its plausible and to my mind a fact that our Islamic enemies will construct nuclear weapons to use against the USA.
Its plausible that they would attempt to steal a commercial jet, to possibly deliver a weapon or two. However, the attack with the most bang for the buck and will be a simultaneous attack on 10 or more port cities that are easily reached by normal shipping.
I’ve looked at the data and the 777 is at the bottom of the Indian Ocean and it will likely take nearly 100 years for its discovery much like the Titanic....
The Titanic did not strike the ocean’s surface at hundreds of miles an hour. I don’t think there will be much left for a late 21st century explorer to explore, just a debris field.
As a person who works for the manufacturer of that aircraft, I can tell you with 100% confidence that if that plane went into the water the debris would be strew all over the southern Indian Ocean. Not one piece of exculpatory evidence of the plane has been recovered. That aircraft has seating that floats, insulation that breaks up and floats, the entire tail assembly is composite and water tight and it will float as well. The wing fuel tanks would be empty by the time it supposedly crashed into the sea and they would float as well. I am dubious of the IO scenario.