The Libertarian Party convention kicks off today in Orlando.
- Is a televised debate between Donald Trump and Bernie Sanders going to happen?
- Donald Trump now has enough delegates to officially become the Republican presidential nominee.
- An antibiotic-resistant superbug has been found in humans and animals in the United States.
- President Barack Obama is now the first sitting U.S. president to have visited Hiroshima since World War II.
- What can be done to stop the spread of Zika virus inside the U.S.?