Some 3,000 US troops recently deployed to insurgent-heavy provinces near Kabul.
The attack highlights the need for alternative routes.
Some 250 US citizens of Afghan origin have made unlikely career changes to become military interpreters.
Policewomen are promoting better community relations, but face discrimination in their own career advancement.
Western forces target the Taliban, but for many Afghans the biggest threat comes from criminals and complicitous police.
Barack Obama says resolving the Indian-Pakistani dispute over Kashmir will be a goal of his presidency, ending eight years of silence on the issue.
The US is helping rebuild an air force that is badly needed in the vast country.
Militants in Pakistan seized 13 Afghanistan-bound trucks – one carrying two Humvees – without firing a single shot.
Poppy cultivation fell by about 20 percent, after two years of record harvests.