te between Brazil and Uruguay over Braziliera
Island in the Quarai/Cuareim River leaves the tripoint with
Argentina in question; action by the joint boundary commission,
established by Chile and Argentina in 2001, for mapping and
demarcating the disputed boundary in the Andean Southern Ice Field
(Campo de Hielo Sur) remains pending

Armenia
Armenia supports ethnic Armenian secessionists in
Nagorno-Karabakh and since the early 1990s, has militarily occupied
16% of Azerbaijan - Organization for Security and Cooperation in
Europe (OSCE) continues to mediate dispute; over 800,000 mostly
ethnic Azerbaijanis were driven from the occupied lands and Armenia;
about 230,000 ethnic Armenians were driven from their homes in
Azerbaijan into Armenia; Azerbaijan seeks transit route through
Armenia to connect to Naxcivan exclave; border with Turkey remains
closed over Nagorno-Karabakh dispute; ethnic Armenian groups in
Javakheti region of Georgia seek greater autonomy; tens of thousands
of Armenians emigrate, primarily to Russia, to seek employment

Aruba
none

Ashmore and Cartier Islands
Indonesian groups challenge Australia's
claim to Ashmore Reef; Australia has closed the surrounding waters
to Indonesian traditional fishing and created a national park in the
region while continuing to prospect for hydrocarbons in the vicinity

Atlantic Ocean
some maritime disputes (see littoral states)

Australia
East Timor and Australia agreed in 2005 to defer the
disputed portion of the boundary for fifty years and to split
hydrocarbon revenues evenly outside the Joint Petroleum Development
Area covered by the 2002 Timor Sea Treaty; East Timor dispute
hampers creation of a revised maritime boundary with Indonesia (see
also Ashmore and Cartier Islands dispute); regional states express
concern over Australia's 2004 declaration of a 1,000-nautical
mile-wide maritime identification zone; Australia asserts land and
maritime claims to Antarctica (see Antarctica); in 2004 Australia
submitted its claims to UN Commission on the Limits of the
Continental Shelf (CLCS) to extend its continental margin from both
its mainland and Antarctic claims

Austria
Austrian anti-nuclear activists have revived blockades of
the Czech-Austrian border to protest operation of the Temelin
nuclear power plant in the Czech Republic

Azerbaijan
Armenia supports ethnic Armenian secessionists