Angola has been struggling to climb back from decades of violence, and its government was clearly banking on the tournament as a chance to show the world it was on the way to recovery. A building boom fueled by oil wealth has included new stadiums in Cabinda and three other cities for the tournament.
The violence also comes five months before the World Cup in South Africa, the first to be held on the continent. The biggest concern leading to that 32-nation tournament has been the security situation in South Africa, a country with one of the world's highest crime rates.
SHOOT: This attack is likely to cast a shadow - and justifiably - over whether or not an African country ought to be allowed to host a World Cup when it can't protect ordinary citizens within its borders, and apparently does care to.