Britain intends to bolster its defenses against the threat of an Argentine invasion.
Defence secretary says there is "a very live threat" as Argentina steps up campaign to reclaim islands.
10 killed in crash near Andes include London 2012 gold medalist, veteran yachtswoman and Olympic boxer.
"Nisman didn't have an accident. He didn't commit suicide. They murdered him."
The previous prosecutor died mysteriously last month.
Alberto Nisman had drafted a request that President Cristina Fernandez be arrested for conspiring to derail his probe into the deadly bombing of a Jewish center.
The government says Nisman's allegations and his death were linked to a power struggle at Argentina's intelligence agency.
Nisman was the lead investigator into the 1994 attack on the AMIA Jewish center that killed 85 people.
Axel Kicillof also said it would be "madness" to pay holdout creditors the 100 cents on the dollar that they were awarded in 2012
Guido Carlotto, one of millions kidnapped during Argentina's military regime, was reunited with his grandmother this week after 36 years apart.
For Argentina, it's coming down to the wire—and the chances appear to be growing that it will default on its sovereign debt
As time runs out for Argentina to pay bondholders, affected elderly pensioners wait with baited breath.
A boastful banner is the second controversy the team has stirred, after a message of ownership over the Falkland Islands.
An explosive mix of interventionist policies, deceitful statistics and rapidly growing double-digit inflation has crippled the economy
For some in Argentina's Villa La Angostura, the eruption of the Puyehue volcano was a once-in-a-lifetime opportunity.