Trade Center warning baffles police An ‘urban myth’ turns out to be true — but what does it mean? By Jonathan Alter SPECIAL TO MSNBC NEW YORK, Oct. 12 — I went to Brooklyn this week in search of an “urban myth” about the World Trade Center attacks. What I came back with was no longer a myth — it was cold, chilling fact. But it didn’t clear anything up for me; that the “myth” was true only made matters murkier. Was word of the attacks on the street beforehand? I wanted to find out. YOU KNOW the “myths”...