Biden, Harris take break from inaugural prep to mark MLK day

Flags are placed on the National Mall, looking towards the Washington Monument, and the Lincoln Memorial, ahead of the inauguration of President-elect Joe Biden and Vice President-elect Kamala Harris, Monday, Jan. 18, 2021, in Washington. (AP Photo/Alex Brandon)

PHILADELPHIA — Two days from the inauguration, President-elect Joe Biden and Vice President-elect Kamala Harris pitched in on Martin Luther King Jr. Day service projects as a militarized and jittery Washington prepared for a swearing-in that will play out under extraordinary security.