It's finally here. Today marks not only President Obama's second inauguration, but also Martin Luther King, Jr. Day, so there's a lot of extra foot traffic in D.C. Between 500,000 to 700,000 people are anticipated to trek to the National Mall and Pennsylvania Avenue NW today to behold the public swearing-in, so the Metro opened at 4 a.m. to accommodate the influx of visitors. Large crowds have already been reported.

This year is not going to be like 2009's inauguration, which attracted some 1.8 million visitors, but Metro spokesman Dan Stessel says that about 89,000 travelers had jumped on the Metro by 7 a.m.

[via DCist]