Obama Mourns With Dallas

At a memorial service Tuesday for five police officers killed in an ambush during a protest in Dallas last week, President Obama said that Dallas was "suffering" but that the city and the nation would ultimately "persevere."

"We know that suffering produces perseverance. Perseverance, character and character, hope," Obama said, referencing scripture. "Right now those words are tested because the people of Dallas, people across the country are suffering.