Joining United in offering tributes to the late President was Delta Air Lines ... flew aboard a specially modified Boeing VC-137C, which was based on the Boeing 707. Known as Air Force One ...

Delta Air Lines once had up to 31 Boeing 747s in its fleet but retired them to make way for the Airbus A350-900. One retired Boeing 747-100 has been preserved at the Delta Flight Museum in Atlanta.

Five years after the botched attempt to rescue American hostages in Tehran, Colonel Nick Alexander's elite Delta Force unit ... fly the crammed-with-people Boeing 707 to Beirut, seasoned deputy ...