Leads
The Lead: "More than 70 people have been killed by two bombs in Baghdad, attached to two mentally disabled women and detonated remotely, says a security offical."
It is easy to point out the important information in this lead.
In order of importance, we find out that 70 people have been killed (who), by a bomb (what) in Baghdad (where). It was attached to two mentally disable women and detontated remotely (how).
All the information in this lead helps set up all the events that have occurred that day in Baghdad.