Can China lead the world on reducing the threat of nuclear war?

Tom Plate says while Obama's visit to Hiroshima is welcome, Xi Jinping has a real opportunity to steer the world away from the use of nuclear arms as a defence option Way back when, rather long ago, a youngish, greenish post-graduate student, obsessing about nuclear war, devoted his first book to it. "Doomsday," I declaimed in Understanding Doomsday: A Guide to the Arms Race for Hawks, Doves and People , "the moment when all the energies of all the nuclear bombs are released over the heads of the inhabitants of the earth.

Sweden to vote on closer NATO ties

Swedish lawmakers are set to vote on 25 May on a Host Nation Agreement with NATO that would represent a step toward further cooperation with the alliance for a nation that has resisted alignment with multilateral military bodies for over 200 years, write Olof Kronvall and Colin Cleary. Olof Kronvall is an expert on transatlantic and European security and teaches at Georgetown and George Washington universities.

Your Turn: May 23

Donald Trump arrives to see his daughter, Tiffany Trump, during the graduation ceremony at the University of Pennsylvania in Philadelphia. A reader wonders if supporters of the Republican presidential candidate would have attended another institution, Trump University, the subject of lawsuits filed by former students.

Sex assault numbers still too high

Despite reforms inspired in part by the Express-News 2013 series "Twice Betrayed," little progress has been made in reducing the number of military sexual assaults, according a new Pentagon report. Despite reforms inspired in part by the Express-News 2013 series "Twice Betrayed," little progress has been made in reducing the number of military sexual assaults, according a new Pentagon report.

Diplomatic outreach: Barack Obama to be first U.S. president to visit Hiroshima

In 1983, President Ronald Reagan decried the totalitarian repression of the Soviet Union by calling it the “focus of evil in the modern world.” Yet in 1988 while visiting with Mikhail Gorbachev in Russia, Mr. Reagan felt the need to soft-pedal his rhetoric when asked by a reporter if he still considered the Soviet Union to be an “evil empire.” The president said he was referring to a “different era” when he used that term. Our elected leaders must sometimes walk diplomatic tightropes while traveling around the world.

Cynthia Tucker: Sanders increasingly appears petulant and shortsighted

When some of his supporters threw chairs at a convention of the Nevada State Democratic Party and threatened the life of Roberta Lange, the state party chairwoman, Sanders' response was to paint the Democratic establishment - the leaders of the party with which he has had a marriage of convenience for decades - as corrupt. He sounded more petulant than apologetic, more angry at his Democratic rival than alarmed at the actions of his supporters.

Ruth: The R-rated general election campaign

At the rate the presidential campaign is quickly turning into Dr. Ruth meets "Last Tango in Palm Beach," this may mark the first time in history the general election debates will need a seven-second delay to guard against a candidate going all Porky's on everyone. Over the past week, we've gotten a very ugly, salacious taste of what to expect as the presumptive Republican and Democratic presidential nominees make their case for why one of them should become the leader of the free world.

World not safer with the US as its policeman

When Elizabeth Trudeau, director of the US State Department Press Office, read a statement on Tuesday about a US Navy surface ship "exercising the right of innocent passage" while transiting near China's Yongshu Reef that day, she said it was to uphold the rights and freedoms of all states under international law and to challenge the excessive maritime claims of some claimants in the South China Sea. She was soon challenged by an Associated Press reporter about who determines what constitutes an excessive maritime claim.