Germany marks 25 years since the fall of the Berlin Wall; President Barack Obama visits China, Burma, and Australia; and the Rosetta spacecraft orbits a comet.

The United States and Cuba hold talks; President Barack Obama delivers his sixth State of the Union address; and technology takes center stage at the Detroit auto show.

The U.S. Supreme Court hears arguments on an immigration case, President Barack Obama travels to Saudi Arabia and Europe, and the UN holds a special session on the global drug problem.

Venezuela marks the first anniversary of Hugo Chavez's death; Israeli prime minister Benjamin Netanyahu visits the United States; and U.S. president Barack Obama releases the FY2015 budget proposal.

Iran and world powers move forward with a nuclear deal; Greece reaches a payment deadline to the European Central Bank and U.S. President Barack Obama travels to East Africa.