Schengen and mass immigration to Europe is effectively over with the latest attacks on Brussels.
The dream of integration and multi-culti bliss is dead. It was a false dream anyway and thus never really alive. Tolerance and intolerance cannot co-exist for long, and radical Islam (and even much of “moderate” Islam) is simply not compatible with Western values. That this was possible was something only academics cloistered away on college campuses with little contact with the real world ever could have believed, but it turns out that dream has real consequences on actual people.
Migrant flows will be staunched. Europe might yet be smart enough to stop stabbing itself in the heart. Maybe.
(Interesting fact about bomb blasts I learned in the army: if you are in the blast radius but no shrapnel strikes you, you can be relatively unharmed but the blast often blows your clothes and shoes clean off — thus the woman in the photo at the top. She probably has a severe concussion, though.)