The five US citizens arrested this week in Pakistan shed light on a growing trend: More US citizens appear to be joining global jihad. Pakistan is taking steps to clamp down.
The US pursuit of Al Qaeda with airstrikes complicates Pakistan's struggle against the Taliban, who launched their largest attack in months over the weekend.
It summoned the US ambassador Thursday to formally complain after an attack hit deep inside Pakistani territory.
The US, India, and Afghanistan are pressuring the government to root out pro-Taliban agents.