I've heard nothing about this. I'd check the PATH's web site to see if they have any special exhibitions active or planned. Note the adjacent 9/11 Museum does include several displays of how the PATH subway system and its worker reacted under pressure when eh Towers were attacked; this may be what you are thinking of.

In 1975 when New York City was going bankrupt the new york daily news printed the now famous front page FORD to new york DROP DEAD.What our government Was doing IS thking new york's money and giving it to the mid and far west to build super highways to NO WEAR . #2 the world trade center was not bombed once BUT TWICE our government did nothing we had to fend for ouraselfs yet again . #3 When we were bombed again where was Bush in a plain in nowhere USA .THere is an old Disco song I WILL SURVIVE. And another song I got along with out you Before I Met You and iIe Get Along without You NOW. And We did .We have always been hated But they keep comming By The Millions. SO BE IT.