2016: The Year in Washington (45 images)

President Barack Obama (R) and Canadian Prime Minister Justin Trudeau, along with first lady Michelle Obama and Sophie Trudeau, wave from the balcony during official welcoming ceremonies on the South Lawn of the White House in Washington, D.C., on March 10. Photo by Pat Benic/UPI

The White House is seen covered in snow following a storm in on January 23 in Washington, D.C. Photo by Kevin Dietsch/UPI

Bono, lead singer of the band U2 and co-founder of the ONE campaign, an anti-poverty organization, testifies during a Senate Appropriations Subcommittee hearing on violent extremism and the role of foreign assistance, on Capitol Hill in Washington, D.C., on April 12. Photo by Kevin Dietsch/UPI

Protesters hold signs outside of the Supreme Court as the Court hears arguments in the case of United States v. Texas, which will consider a legal challenge to the Deferred Action for Parents of Americans (DAPA) program and the expansion of the Deferred Action for Childhood Arrivals (DACA) program, in Washington, D.C., on April 18. Photo by Kevin Dietsch/UPI