Former presidents are weighing in on the killing of Osama bin Laden by American forces operating inside Pakistan.

Former President George W. Bush, whose entire presidency was defined by the September 11th attacks, said in a statement tonight that President Obama called him to inform him of the news of bin Laden’s death.

Bush called the operation a “momentous achievement” that “marks a victory for America, for people who seek peace around the world, and for all those who lost loved ones on September 11, 2001.”

“I congratulated him and the men and women of our military and intelligence communities who devoted their lives to this mission. They have our everlasting gratitude,” the former president said in a statement. “The fight against terror goes on, but tonight America has sent an unmistakable message: No matter how long it takes, justice will be done.”

Former President Bill Clinton, who was in office for the first World Trade Center bombing in 1993, also issued a written statement.

“I congratulate the President, the National Security team and the members of our armed forces on bringing Osama bin Laden to justice after more than a decade of murderous al-Qaida attacks,” he said.

(Source: ABC)