AP Top News at 3:15 a.m. EDT

N. Korean missile test fails hours after UN meeting on nukes
SEOUL, South Korea (AP) - A North Korean mid-range ballistic missile apparently failed shortly after launch Saturday, South Korea and the United States said, the third test-fire flop just this month but a clear message of defiance as a U.S. supercarrier conducts drills in nearby waters. North Korean ballistic missile tests are banned by the United Nations because they're seen as part of the North's push for a nuclear-tipped missile that can hit the U.S. mainland. The latest test came as U.S. officials pivoted from a hard line to diplomacy at the U.N. in an effort to address what may be Washington's most pressing foreign policy challenge.

Trump to spend Day 100 in office talking tough on trade
WASHINGTON (AP) - President Donald Trump is marking his 100th day in office by talking tough on trade. The White House says the president will sign an executive order Saturday that will direct his Commerce Department and the U.S. trade representative to perform a comprehensive study of the nation's trade agreements. The aim is to determine whether America is being treated fairly by its trading partners and the 164-nation World Trade Organization. The venue for the signing of the executive order is a shovel factory in Pennsylvania's Cumberland County. In the evening, the president will appear at a rally in Harrisburg to cap the occasion of his first 100 days in office.

US executions: New troubles could resonate in upcoming case
COLUMBUS, Ohio (AP) - Is unorthodox the same as cruel and unusual punishment? It's the central question of the current U.S. death penalty debate, highlighted by the latest execution involving a disputed sedative that appeared to involve discomfort to the inmate. States struggling to find lethal drugs believe they've got the answer in midazolam, a sedative that's taking the place of barbiturates and anesthetics no longer available because drug manufacturers don't want them used in executions. States that have the drug won't say where they've obtained it, but in recent months have secured enough supplies to carry out or plan executions.

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Arkansas will face challenges replenishing execution supply
Arkansas will have a more difficult time obtaining additional lethal injection drugs after an unprecedented court challenge by a drug distributor and possible complications during at least one of the four executions the state carried out this month, experts said. The state launched an ambitious plan to execute eight death row inmates over 11 days to beat the expiration date on one of the three drugs needed under the state's lethal injection protocol, but four of the executions were halted by courts. Arkansas' remaining supply of midazolam expires Sunday, and it's not known where the state will be able to get more of the sedative or its dwindling supply of the other two drugs.

Critics question top US prosecutor's style after blunt words
WASHINGTON (AP) - With two dust-ups in a week, first with a judge in Hawaii and another with leaders of the nation's largest and most powerful police department, Attorney General Jeff Sessions sounds to some more like the conservative senator from Alabama he once was rather than the top prosecutor he is today. And some observers say the Republican's blunt style could strain relationships with the very law enforcement officials whose partnerships he contends are vital and risks politicizing criminal justice issues that demand the Justice Department's attention. Sessions drew the ire of Hawaii's Democratic lawmakers after saying on a radio show he was "amazed that a judge sitting on an island in the Pacific" could stop President Donald Trump's travel ban, though he later indicated the comment was meant as a joke.

Pope Francis to celebrate Mass in Cairo on 2nd day of trip
CAIRO (AP) - Pope Francis will celebrate Mass for Egypt's tiny Catholic community and meet with its priests and seminarians before returning to Rome. Local media reports say at least 25,000 are expected at Saturday's Mass in Cairo, which comes on the second day of Francis' two-day trip to the Arab world's most populous country Francis on Friday urged Egypt's Muslim leaders teach a rejection of violence in God's name during the delicate visit and he strongly backed its uncompromising crackdown on political Islam and militancy. His main event was a landmark visit to Cairo's Al-Azhar, the revered, 1,000-year-old seat of Sunni Islam learning that trains clerics and scholars from around the world.

The Latest: Security tight at stadium where pope holds mass
Security is exceptionally tight around Cairo and the sports stadium where Pope Francis will celebrate Mass for Egypt's tiny Catholic community. Both uniformed and plain-clothed police were stationed every meter (yard) or so along Francis' motorcade route on Saturday, and cars and taxis were prevented from stopping. At the stadium, police used metal detectors to check vehicles for explosives. Others stood guard, some on rooftops, their faces covered. Francis decided to forego the bullet-proof "popemobile" that his predecessors used on foreign trips and drove through Cairo in a simple Fiat. Once in the stadium he plans to greet the crowd in an open golf cart, a reflection of his desire to be close to his flock.

Experts: Long road ahead for Trump offshore drilling order
President Donald Trump's executive order seeking to find new ocean expanses in the Atlantic and the Arctic for offshore drilling isn't likely to reach its goals anytime soon, but instead will kick off a yearslong review and legal battle. Trump signed the order Friday aimed at dismantling a key part of former President Barack Obama's environmental legacy. "This executive order starts the process of opening offshore areas to job-creating energy exploration," he said. "It reverses the previous administration's Arctic leasing ban and directs Interior Secretary Ryan Zinke to allow responsible development of off-shore areas that will bring revenue to our treasury and jobs to our workers." Despite Trump's assertion that the nation needs to wean itself of foreign oil, U.S.

UAE's battle-hardened military expands into Africa, Mideast
DUBAI, United Arab Emirates (AP) - The United Arab Emirates is better known for its skyscrapers and pampered luxuries, but its small size belies a quiet expansion of its battle-hardened military into Africa and elsewhere in the Middle East. The seven-state federation ranks as one of Washington's most prominent Arab allies in the fight against the Islamic State group, hosting some 5,000 American military personnel, fighter jets and drones. But the practice gunfire echoing through the deserts near bases outside of Dubai and recent military demonstrations in the capital of Abu Dhabi show a country increasingly willing to flex its own muscle amid its suspicions about Iran.

Hacker threatens to release stolen copies of Netflix series
SAN FRANCISCO (AP) - A hacker claims to have stolen the upcoming season of Netflix's hit series "Orange Is The New Black," and is demanding that the video streaming service pay an unspecified ransom to prevent all the new episodes from being prematurely released online. The hacker, operating under the name The Dark Overlord, has already purportedly uploaded the first episode to an illegal file-sharing service. The Associated Press could not legally confirm the authenticity of that uploaded file. New episodes of "Orange" are scheduled for official release on June 9. Netflix said that a small production vendor that works with several major TV studios had suffered a breach.