Nicolò Drago (Trento)
Helmut Friedrich (AEI)
In the last 30 years an enormous amount of work has been done on the existence and global structure of asymptotically flat solutions to Einstein's field equations. Many of these contributions are in themselves fairly complete. There are, however, still gaps in the general, overall understanding. In this talk I shall discuss some of the questions whose answers would result in a more complete picture of the situation.