A flyer for this is provided here.

With the NATO conference coming up in Chicago — the G8 conference was scared into moving their conference to Camp David — Occupy and affiliated movements are kicking into full gear, planning protests and more. Their grievances? Out of control military spending (nearly 700 billion per year), civilian deaths in unaccountable drone strikes, the military industrial complex and war in general. They will hold a “People’s Summit” to counter the G8 and NATO summits.

A group calling itself 99% Solidarity is planning to bus protesters to Chicago to join in on the action. The buses will leave on the 14th or 15th. From the website:

Currently, buses will be leaving from the following cities in time to arrive in Chicago on May 17.
Portland
New York City
Washington DC
Boston, MA
Providence, RI
Burlington, VT
Salem, NH
Philadelphia, PA
Atlanta, GA
Oakland CA
Los Angeles, CA
San Francisco, CA
Continue reading Occupy NATO on May 18th to 22nd — Free Bus Trips