Dual attacks in Indian-administered Kashmir killed at least eight and drew calls from Indian politicians to cancel the upcoming meeting between the Indian and Pakistani prime ministers.
The bombing is the largest attack against the Christian minority in Pakistan ever and raises concerns about the new prime minister's plan to talk to militants.
A specific threat prompted a move of US personnel to Islamabad. The Pakistani government is also on high alert.
The killing of five Indian soldiers along the Kashmir border last night comes as the two nuclear powers prepare to restart negotiations.
The tumultuous relationship between the US and Pakistan is moving in a more positive direction after worsening for years.
What do the jailbreaks in Pakistan, Iraq, and Libya have in common? Massive amounts of US assistance to avoid this sort of thing.