In a meeting <a href=" http://www.wigt.co.uk/cheap-ibuprofen.pptx ">can i take 600 mg ibuprofen every 6 hours</a> Wednesday will mark a half century since Martin Luther King Jr. delivered the iconic "I Have a Dream" speech on Aug. 28, 1963. A rally is planned on the National Mall for the anniversary, and President Obama is scheduled to speak on the steps of the Lincoln Memorial.