Weekly Standard editor Bill Kristol reports that “two reliable sources” tell him former New York City Mayor Rudy Giuliani will run for the GOP’s presidential nomination in 2012. “He may throw his hat in the ring soon,” Kristol writes. Giuliani’s last run at the presidency in 2008 ended rather quickly after several early primary losses. The most memorable moment of his campaign became Joe Biden’s “a noun, a verb, and 9/11” retort during a Democratic debate in Philadelphia. This fall will mark the 10th anniversary of 9/11.