Democratic Party presidential primaries, 2016 Former Governor of Maryland Martin O'Malley will announce his candidacy for President of the United States at 10:00 am on May 30.
Muhammadu Buhari Muhammadu Buhari is sworn in as the President of Nigeria following a recent election.
Dustin Diamond American television actor Dustin Diamond is convicted of two misdemeanor charges stemming from a stabbing at a Wisconsin bar last year but acquitted on felony charges.
Silk Road Silk Road founder Ross Ulbricht is given a life sentence after being convicted for narcotics trafficking.
The President of France François Hollande and the Chancellor of Germany Angela Merkel call on the President of Russia Vladimir Putin to implement measures agreed on the Minsk ceasefire.
United States The United States officially removes Cuba from its list of State Sponsors of Terrorism.
Irish Naval Service Irish Naval Service patrol vessel LÉ Eithne rescues 300 migrants in the Mediterranean Sea off the coast of Libya.
2015 Rohingya refugee crisis Thailand will allow the United States to fly surveillance planes through their airspace, allowing the United States to identify boats carrying refugees.
MERS The number of cases in an outbreak of Middle East respiratory syndrome in South Korea rises to 12.
2015 Indian heat wave The official death toll from the Indian heat wave passes 1,800 making it the deadliest heatwave in more than two decades.
2015 Texas–Oklahoma flood and tornado outbreak The Governor of Texas Greg Abbott asks for a Presidential declaration of a disaster to obtain United States Government assistance for the worst affected areas of the state.
Dozens of people are rescued in the US state of Texas. The death toll from floods in Texas and Oklahoma has reached 24 dead with 13 missing with another 15 people dead from tornadoes in northern Mexico and Texas.
Volcano A volcano erupts on the Japanese island of Kuchinoerabu-jima prompting the evacuation of all residents and the diversion of all flights.
Balochistan conflict Gunmen in Pakistan's Balochistan Province attack two buses killing at least 19 people.
Islamic State of Iraq and the Levant Dammam Mosque bomb blast:Islamic State claims responsibility for a car bomb in the parking lot of the Imam Hussain Mosque situated in Dammam, Saudi Arabia, during Friday prayers, with at least four people killed and dozens injured. Authorities state that the mosque itself was not hit. '