‘Hand grenade’ fool visits WTC

YEAH, THAT wasn’t such a good idea — but it turns out it wasn’t a crime.

Christopher Oler, 24, of Maryland, brought a paperweight made to look like an inert hand grenade into 1 World Trade Center in lower Manhattan on Thursday, officials and sources said.

Port Authority police charged him with placing a fake bomb inside a bag knowing it could be construed as a real device, but prosecutors decided not to pursue a case against him.

Oler was in town to sign documents for a new job, a relative said. Screeners spotted the paperweight just after 9 a.m. when it passed through a north lobby X-ray machine.Authorities briefly locked down the area until the NYPD bomb squad gave the all-clear.