Super Tuesday U.S. presidential nominating contests take place, Venezuela deals with an economic crisis, and the Academy Awards are held.

Opposition groups face new hurdles in Venezuela and U.S. technology and media giants arrive in Washington D.C. for intelligence hearings. 

French president Emmanuel Macron meets Russian president Vladimir Putin, the UN Security Council meets to discuss Yemen, and the Organization of American States examines the crisis in Venezuela. 

Venezuela holds talks over a presidential recall referendum, a Dutch party leader goes on trial for making discriminatory remarks, and the Paris Climate Agreement comes into effect.

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.