Chicago is preparing for another day of violent protests as the NATO summit comes to a close Monday.
Police clashes with demonstrators led to several injuries and dozens of arrests over the weekend in President Obama's hometown of Chicago.
Police took into custody three Florida men who authorities say came to the Windy City to take part in protests, including one May Day demonstration by so-called Black Bloc Anarchists in front of Chicago's Bank of America.
The three are accused of manufacturing molotov cocktails with plans to attack the president's campaign headquarters and the home of Chicago Mayor Rahm Emanuel during the NATO summit.
"My office has charged each of these individuals with material support for terrorism, conspiracy to commit terrorism, and possession of explosives or incendiary devices," Illinois state attorney Anita Alvarez said.
The NATO summit now turns its focus on ending the mission in Afghanistan.
The gathering was about "painting a vision of post-2014 in which we have ended our combat role," Obama said at the summit.
Afghan President Hamid Karzai apologized to Americans for for being a burden.
"I'm bringing to you and to the people of the United States the gratitude of the Afghan people for the support that your taxpayers' money has provided for Afghanistan over the past decade," Karzai said.
As world leaders met indoors, many of the day's protests outdoors were peaceful as thousands marched through the streets of downtown Chicago, calling for an end to the war.
"The NATO generals need to have accountability to the service members serving under them," one protestor said, who is an Iraq War veteran.
"The people are sick of war. We want money for education, for housing, for jobs, for all of the social programs that the people in this country love so well," another protestor said. "We've had it up to here with war."
Prosecutors charged two more people on Sunday as part of their investigation into three separate violent plots against the summit.