What's happening in Pakistan?

The Independent out of the UK has the best connected account I have seen.
Note this passage:

Ordinary Pakistanis have been left bewildered [by recent terrorist attacks], unable still to believe that the danger comes from within the country.

"Only God knows where such people come from because I know that Muslims cannot kill other Muslims," said Mohammad Yousaf, a 55-year-old, who runs a tea shop near one of the police training schools in Lahore and spent several hours hiding instead his store Thursday as gunfire and explosions engulfed the area.

Image: Outside Army HQ after the attack on it this month.