Iranian scientist freed by U.S. returns home - local media

DUBAI (Reuters) - An Iranian scientist held for more than a year in California on charges of violating U.S. sanctions arrived in Iran on Saturday, Iranian media reported, after being freed in what the Omani foreign ministry said was a humanitarian gesture.

Mojtaba Atarodi, 55, an assistant professor of electrical engineering at Iran's Sharif University of Technology, had been detained on suspicion of buying high-tech U.S. laboratory equipment, previous Iranian media reports said.

The trade sanctions were imposed over Iran's nuclear programme, which Iranian officials say is for peaceful energy purposes only but Washington says is secretly geared to developing the capability to produce nuclear weapons.

Iran's semi-official Mehr news agency said Atarodi arrived in Tehran on Saturday, after a stopover in Muscat on Friday.

Upon arriving at Tehran's Imam Khomeini airport on Saturday, Atarodi told reporters that he had tried to buy simple equipment for his personal lab to conduct academic research when he was detained by U.S. authorities, according to state-run Press TV.

There was no immediate U.S. comment on Atarodi's case.

Oman, a U.S.-allied Gulf Arab state which also enjoys good relations with Tehran, has previously helped mediate the release of Western prisoners held by the Islamic Republic.

Omani authorities had worked with U.S. officials to speed up Atarodi's case and return him home, the foreign ministry in Muscat said in a statement carried by local media.

He was released after follow-up approaches by Iran's foreign ministry, its spokesman Ramin Mehmanparast was quoted as saying by the Iranian Students' News Agency (ISNA).

In a report on its website dated January 7, 2012, Press TV said Atarodi was taken into custody on his arrival in Los Angeles on December 7, 2011, accused of buying advanced lab equipment.

Iran and the United States severed relations after the 1979 Islamic Revolution that overthrew the pro-Western monarchy in Tehran.

In 2011, Iran freed into Omani custody two U.S. citizens who had been sentenced to eight years in jail for spying.

Josh Fattal and Shane Bauer, among three people arrested while hiking along the Iraq-Iran border in 2009, were flown to Oman after officials there helped secure their release by posting bail of $1 million. They denied being spies.

The third detainee, Sarah Shourd, had been freed in September 2010, also by way of Oman.

(Reporting by Saleh al-Shaybani and Sami Aboudi; additional reporting by Zahra Hosseinian in Zurich and Yeganeh Torbati in Dubai; Editing by Mark Heinrich)

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SpaceX Dragon capsule returns from International Space Station

By Irene Klotz

CAPE CANAVERAL, Florida (Reuters) - A Space Exploration Technologies' Dragon cargo capsule splashed down in the Pacific Ocean on Tuesday, bringing back science experiments and gear from the International Space Station.

The spacecraft left the orbital outpost at 6:56 a.m. ET, and parachuted into the ocean about 225 miles west of Mexico's Baja California at 12:34 p.m. ET.

"Recovery ship just heard the sonic booms from Dragon re-entry and has data transmission lock," Elon Musk, founder and chief executive of the privately held company known as SpaceX, wrote on Twitter just before splashdown.

A minute later, recovery ship personnel reported seeing Dragon's parachutes, Musk said.

"Recovery ship has secured Dragon," Musk wrote. "Cargo looks A-OK."

The ship will take the capsule to the Port of Los Angeles, near the company's Hawthorne, California, headquarters, a journey expected to take about 30 hours.

Dragon's return began 252 miles above Earth when astronauts aboard the station used a robotic crane to pluck the capsule from its berthing port and set it into orbit.

SpaceX flight controllers then stepped in and remotely commanded Dragon to fire its steering thrusters and begin the 5.5-hour journey home.

"It looks beautiful from here," station flight engineer Thomas Marshburn radioed to Mission Control in Houston as the capsule flew away.

"Sad to see the Dragon go. Performed her job beautifully, heading back to her lair. Wish her all the best for the splashdown today," Marshburn said.

The Dragon cargo ship reached the station on March 3 with more than 2,300 pounds (1,043 kg) of science equipment, spare parts, food and supplies. It was the second of 12 planned cargo runs for NASA under a $1.6 billion contract. A second freighter, built and operated by Orbital Sciences Corp, is expected to debut this year.

The U.S. space agency hired both firms to fill the gap left by the retirement of its space shuttle fleet in 2011.

Dragon's arrival was delayed a day while SpaceX engineers grappled with a thruster pod problem that had threatened to derail the mission.

"I don't want to go through that again. That was hard-core," Musk said during a keynote speech at the South by Southwest conference in Austin, Texas, earlier this month.

PRECISION RENDEZVOUS

Engineers believe the glitch was caused by a blockage in a pressurization line or a stuck valve. It was cleared and the capsule made a precision rendezvous with the station with no problems. An investigation remains under way, said company spokeswoman Christina Ra.

Dragon returned to Earth with 2,668 (1,210 kg) of cargo, including a freezer filled with biological samples from the crew for medical research.

While Russian, European and Japanese freighters also service the station, only the SpaceX vessel is designed to return cargo to Earth, a critical transportation link that had been lost with the retirement of the shuttles.

SpaceX is working to upgrade the Dragon capsule to fly people as well. A test flight with company astronauts is targeted for 2016.

In addition to enhancing the Dragon capsules, SpaceX is working on an upgraded Falcon 9 rocket. Last week, the rocket's new Merlin engines completed a 28th and final test run, certifying it for flight, Ra said.

The company plans to debut its upgraded Falcon 9 rocket on a science satellite-delivery mission for the Canadian Space Agency in June.

That rocket also will be the first flight from SpaceX's new launch pad at Vandenberg Air Force Base in California. Five previous Falcon 9 flights have launched from Cape Canaveral Air Force Station in Florida.

Dragon's return initially was scheduled for Monday, but it was docked an extra day because of high seas in the Pacific.

Meanwhile, Orbital Sciences Corp, which holds an eight-flight, $1.9 billion NASA contract for station resupply flights, plans to test launch its new Antares rocket as early as April 16 from the commercial Mid-Atlantic Regional Spaceport at NASA's Wallops Flight Facility in Virginia.

Orbital's Cygnus cargo capsule is targeted to make a demonstration run to the space station later in the year.

(Editing by Vicki Allen)

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