BERLIN -- Berlin's Neue Nationalgalerie, an iconic modern art museum designed by Bauhaus pioneer Ludwig Mies van der Rohe, reopened to the public Sunday after a six-year refurbishment of the glass-fronted building.Germany's culture minister, Monika Gruetters, said during a celebration ceremony held Saturday that the occasion marked the museum's “brilliant comeback as a pilgrimage site for lovers of modern art and as a stage for contemporary artists.”British architect David Chipperfield oversaw