Rick Santorum Rick Santorum announces he will be seeking the nomination of the Republican Party in the 2016 United States presidential election.
Prime Minister of Denmark The Prime Minister of Denmark Helle Thorning-Schmidt calls an election for June 18.
Newly elected The newly elected British House of Commons commences its session with the State Opening of Parliament ceremony in which the Queen's Speech is delivered.
Greenland The parliament of Greenland unanimously votes to legalize same-sex marriage by 1 October, 2015.
Legislature The Legislature of the US state of Nebraska votes to outlaw the death penalty, overriding a veto by Governor Pete Ricketts.
FIFA corruption scandal Swiss federal prosecutors open criminal procedures in relation to the awarding of the 2018 and 2022 FIFA World Cups.
Six FIFA officials are detained in Switzerland for extradition to the United States in relation to allegations of corruption between the 1990s and now. Those arrested include Jeffrey Webb, Jack Warner, Eduardo Li, Eugenio Figueredo and José Maria Marin.
Prime Minister of the United Kingdom Former Prime Minister of the United Kingdom Tony Blair resigns as the peace envoy of the Quartet on the Middle East.
United States Representatives from the United States, Japan and South Korea meet in Seoul on how to respond to North Korea's nuclear weapons program.
2015 Indian heat wave The death toll in the two worst affected states Andhra Pradesh and Telangana passes 800.
2015 Texas–Oklahoma flood and tornado outbreak A sixth person is found to have died in this week's floods in Harris County, Texas, which contains the city of Houston.
Chinese At least 12 people, associated with the Kangleyuan Rest Home in the Chinese city of Pingdingshan in Henan province which was destroyed by fire with the loss of 38 lives, are detained for questioning.
ISIL Islamic State militants have carried out multiple suicide bombings targeting the Iraqi Army in Anbar Province killing at least 17 people.