Hunt resumes for Alps plane crash DNA, black box

Investigators sifting through the wreckage of the doomed Germanwings plane in the French Alps were forced Monday to resume the hunt on foot as bad weather hampered helicopter flights.
"The teams will get to the site via the path that is already in existence," said Yves Naffrechoux of the local mountain police.
Authorities are hoping to identify more DNA strands from the 150 people who died in Tuesday's crash, as well as locate the jet's second black box that should provide more clues as to the circumstances of the tragedy.
Forensic teams have isolated almost 80 distinct DNA strands from the pulverised aircraft and have described the grim task as "unprecedented" given the tricky mountain terrain and the speed at which the plane smashed into the rock.
French officials have said that co-pilot Andreas Lubitz deliberately shut his pilot colleague out of the cockpit and then locked the Airbus A320 on a collision course with the French Alps.
The flight, en route to Duesseldorf from Barcelona, crashed into the mountainside at a speed of 700 kilometres (430 miles) an hour, instantly killing all on board.
- Difficult mountain terrain -
Authorities are hoping to build a more sturdy road to the crash site -- both to ease access for forensic experts and for families who want to see where their loved ones perished.
A bulldozer and several specialised machines were already working away at the site to bolster the road access.
The director of operations at Germanwings, Oliver Wagner, told reporters that 325 grieving relatives had so far made the trip to the village of Seyne-les-Alpes, close to the crash site.
"The majority has been German and Spanish families but we've also had people from Mexico, Japan, Colombia, Venezuela or Argentina," he said.
Wagner said Germanwings and parent company Lufthansa had 90 people on the ground to care for the families, including around a dozen psychological counsellors.
He reiterated that the company had announced it would immediately compensate each family to the tune of 50,000 euros ($54,000).
This sum would not be deducted from any final compensation deal, he stressed.
Rescue workers are currently having to hike around three-quarters of an hour to the crash site through difficult mountain terrain, Naffrechoux said.
As on previous days, there are about 50 personnel at the crash site, he said.
"The black box has been the major target from the beginning and even more so today," he said.
Authorities say the working conditions at the inhospitable crash site have hugely slowed their progress.
Not a single body is intact, said Patrick Touron, deputy director of the police's criminal research institute.  
"We have slopes of 40 to 60 degrees, falling rocks, and ground that tends to crumble," he said.
"Some things have to be done by abseiling. Since safety is key, the recovery process is a bit slow, which is a great regret."
Between 400 and 600 body parts were being examined, Touron said.
Investigators in both France and Germany are trying to build up a picture of what could have driven Lubitz to crash his plane deliberately.
Media reports have emerged that the 27-year-old suffered from eye problems, adding to earlier reports he was severely depressed.
Police have found a number "of medicines for the treatment of psychological illness" during a search at his Duesseldorf home, Welt am Sonntag newspaper said.
German prosecutors believe Lubitz hid an illness from his airline but have not specified what it was, and said he had apparently been written off sick on the day the Airbus crashed.