President Obama announced plans to greatly reduce the number of US forces in Afghanistan, to conclude combat missions in the country this year and to end the US military commitment by the end of 2016.
The president acknowledged that US forces had been in Afghanistan for longer than expected, but said they were now at the stage to plan to "finish the job we started."
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Colo became a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.
The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.