Air Blockade Fear for Falklands - Argentine President Cristina Fernandez says she wants to renegotiate an agreement with the UK on flights to the Falkland Islands from South America.   The islands are currently served by weekly flights from Chile and of course by military flights from Ascension.   The Argentine proposal is that the air link to be operated by Argentina's state owned airline Aerolineas Argentinas direct from Buenos Aires.    The Foreign Office said it expected Argentina to honour its commitments under a 1999 agreement allowing flights from Chile.     There have been concerns in the Falklands that Argentina might block the flights operated by Chilean airline LAN, which are the islands' only commercial air link with South America.    On the 2^nd April, both nations will mark the 30th anniversary of the 1982 Falklands War, which began with an Argentine invasion of the islands and ended in victory for a British Task Force sent to recover them