to resolve territorial disputes arising from substantial
cartographic discrepancies, the largest of which lie in Bhutan's
northwest and along the Chumbi salient

Bolivia
Chile and Peru rebuff Bolivia's reactivated claim to restore
the Atacama corridor, ceded to Chile in 1884, but Chile offers
instead unrestricted but not sovereign maritime access through Chile
for Bolivian natural gas and other commodities; an accord placed the
long-disputed Isla Suarez/Ilha de Guajara-Mirim, a fluvial island on
the Rio Mamore, under Bolivian administration in 1958, but
sovereignty remains in dispute

Bosnia and Herzegovina
sections along the Drina River remain in
dispute between Bosnia and Herzegovina and Serbia; discussions
continue with Croatia on several small disputed sections of the
boundary related to maritime access that hinder final ratification
of the 1999 border agreement

Botswana
Botswana still struggles to seal its border from thousands
of Zimbabweans who flee economic collapse and political persecution;
Namibia has long supported, and in 2004 Zimbabwe dropped objections
to, plans between Botswana and Zambia to build a bridge over the
Zambezi River at Kazungula crossing, thereby de facto recognizing
the short, but not clearly delimited, Botswana-Zambia boundary

Bouvet Island
none

Brazil
unruly region at convergence of Argentina-Brazil-Paraguay
borders is locus of money laundering, smuggling, arms and illegal
narcotics trafficking, and fundraising for extremist organizations;
uncontested boundary dispute with Uruguay over Isla Brasilera at the
confluence of the Quarai/Cuareim and Invernada rivers, that form a
tripoint with Argentina; the Itaipu Dam reservoir covers over a once
contested section of Brazil-Paraguay boundary west of Guaira Falls
on the Rio Parana; an accord placed the long-disputed Isla
Suarez/Ilha de Guajara-Mirim, a fluvial island on the Rio Mamore,
under Bolivian administration in 1958, but sovereignty remains in
dispute

British Indian Ocean Territory
Mauritius claims the Chagos
Archipelago including Diego Garcia; in 2001, the former inhabitants
of the Chagos Archipelago, evicted in 1967 and 1973 and now residing
chiefly in Mauritius, were granted UK citizenship and the right to
repatriation; in May 2007, the UK Court of Appeals upheld the May
2006 High Court of London judgment reversing the UK government's
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