NATO, Keystone Pipeline Protesters Descend on Chicago—PICTURES

Updated: May 21, 2012 | 6:50 a.m.
May 18, 2012 | 2:10 p.m.

Scores of protesters, incensed about a host of issues, from globalization, to the war in Afghanistan, to the Keystone Pipeline, will greet the dozens of foreign officials arriving in Chicago for the coming NATO summit there. Here's a look at the scene in the Second City.

A protester is detained by police at a march and rally during this weekend's NATO summit in Chicago on Sunday, May 20, 2012 in Chicago. (AP Photo/Paul Beaty)

Chicago police scuffle with demonstrators during a protest march and rally at this weekend's NATO summit in Chicago Sunday, May 20, 2012 in Chicago. (AP Photo/Paul Beaty)

Demonstrators make their way towards Michigan Ave. during a protest march as a part of this weekend's NATO summit in Chicago Sunday, May 20, 2012 in Chicago. (AP Photo/Kim Johnson Flodin)

Antiwar activists demonstrate outside President Obama's campaign headquarters in downtown Chicago, calling for an end to NATO operations in Afghanistan, on Thursday, May 17. (AP Photo/Charles Rex Arbogast)

Demonstrators conduct a "die-in" covered in oil as they protest the Keystone XL pipeline and Alberta tar-sands oil extraction outside of the Canadian Consulate in downtown Chicago on Thursday, May 17. (AP Photo/Nam Y. Huh)

Demonstrators ride their bicycles in downtown Chicago during a rally against the Keystone XL oil pipeline on Thursday, May 17. (AP Photo/Nam Y. Huh)

A demonstrator holds a sign during a rally in downtown Chicago protesting the Keystone XL pipeline on Thursday, May 17. (AP Photo/Nam Y. Huh)

Demonstrators conduct a "die-in" covered in oil as they protest the Keystone pipeline outside of the Canadian Consulate in downtown Chicago on Thursday, May 17. (AP Photo/Nam Y. Huh)

Demonstrators carry a sign as they march in protest of the Keystone pipeline outside of the Canadian Consulate in downtown Chicago on Thursday, May 17. (AP Photo/Nam Y. Huh)

A placard with the Canadian flag rests on the ground covered in oil as demonstrators protest in Chicago against the Keystone pipeline on Thursday, May 17. (AP Photo/Nam Y. Huh)

A demonstrator holds a Canadian flag in Chicago on Thursday, May 17. (AP Photo/Nam Y. Huh)

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