1.   The construction crew was replacing bricks and working on windows when the facade tumbled into the courtyard of the building, authorities said.

2.   The men were working six floors up Wednesday when the facade tumbled into the courtyard of the building on Park Avenue just north of Union Square, authorities said.

3.   The men were working Wednesday on windows when the facade tumbled into the courtyard of the building on Park Avenue just north of Union Square, authorities said.

4.   The men were working six floors up when the facade tumbled into the courtyard of the building on Park Avenue just north of Union Square, authorities said.