President Obama concluded his formal remarks at a joint press conference with French President Francois Hollande on Tuesday by saying that next week’s Global Climate Conference in Paris will be a “powerful rebuke” to terrorists such as the Islamic State.

Appearing together in the White House East Room, Obama and Hollande each made a statement on the current state of the effort to counter the Islamic State before taking questions from the press.

After expressing solidarity with France in the wake of the recent terrorist attacks in Paris carried out by Islamic State and discussing more broadly the campaign against the jihadist group, Obama stated, “And next week, I will be joining President Hollande and world leaders in Paris for the Global Climate Conference. What a powerful rebuke to the terrorists it will be when the world stands as one and shows that we will not be deterred from building a better future for our children.”

Hollande is visiting Washington this week to seek a greater commitment from the United States in fighting Islamic State as the French president has taken far more aggressive military actions in Iraq and Syria since the Paris attacks, including the deployment of the Charles de Gaulle aircraft carrier to the region and increased airstrikes.

Many people in the U.S.—both Democrats and Republicans—as well as allies abroad, feel that Obama is not doing enough to counter the terror group and address the civil war in Syria while the president has argued that his strategy is working in pushing back the jihadist group but will take time.

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