Trump knows bombing Iran's Fordo nuke site has pros and cons.  
He thinks it's needed 'cause weapons could be made fast there.  
"Not many options," a source says. "Destroying Fordo gets it done."  
He okayed attack plans but hasn't decided yet.  
Might join Israel's strikes if needed to take it out.  
By Thursday, still weighing choices.  
One idea: Iran shuts Fordo down itself.  
But no final call's been made.

Trump's carefully weighing the Fordo strike, it's awesome he's exploring all options to keep everyone safe while making tough calls