Yikes: A beam that was being lifted at 4 World Trade Center accidentally hit windows between the 45th and 46th floors, sending glass on the ground below and forcing pedestrians to take cover. No one was injured, but dozens of firefighters responded to the scene.

Tishman Construction's statement says, "A sudden gust of wind caused a steel load to impact a curtain wall panel on the south side of Tower 4. As a result, some pieces of glass fell onto Liberty Street. Fortunately, the street was closed at the time, and the Liberty Street sidewalk is protected by a construction shed. We have suspended steel lifts pending an investigation, are inspecting the entire façade of the building, and are reviewing protocols for evaluating weather conditions."

Yesterday, a construction worked impaled himself on some rebar at 4 WTC.