http://edition.cnn.com/2012/04/20/world/pakistan-plane-crash/?hpt=wo_c2

Islamabad, Pakistan (CNN) -- A commercial airplane carrying at least 121 people crashed Friday in Rawalpindi just before it was to land at an airport in Islamabad, according to Pakistan's Civil Aviation Authority, which cited poor weather as a possible factor.

Investigators are "going to be looking at technology," aviation security consultant Greg Feith said. "What kind of radio equipment, what kind of ground proximity warning system the aircraft was equipped with, weather radar, things like that ... since the weather may be a factor in this accident."