UN launches ${esc.dollar}678 mln Afghan humanitarian appeal
About a quarter of Afghans don't have enough to eat
Sudan says SLA a target, rejoining rebel allies
Attack on SLA forces "declaration of war" - SLA spokesman
ICRC sees Afghan humanitarian situation worsening
Civilian casualties rise and access to health care shrinks
South Sudan army says northern ambush kills 12
Ambush comes as north-south tensions rise ahead of a Jan. 9 vote on southern independence
ICRC appeals for record $1 bln for field work in 2011
ICRC expects that for the second year running, war-torn Afghanistan will be its most expensive operation