This is how the U.S. military plans for Inauguration Day: It uses a giant map.
Security at Donald Trump's inauguration is expected to be challenging. Mainly because of the large amount of protests that are expected to take place.
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The D.C. National Guard is estimating around 800,000 people will attend the inauguration, although the numbers could be higher. President Obama's first inauguration drew a record-breaking 1.8 million people.
An estimated 13,000 service members will be supporting this year's inauguration.