"Turkey's cycle of violence
By Gregg Carlstrom
Kurdish fighters and Turkish soldiers have clashed more than a dozen times in recent months
Monday's bombing of a military bus in Istanbul was the latest flashpoint in an escalating cycle of violence between Kurdish fighters and the Turkish military.
The location was unusual - fighting usually occurs in rural parts of southeastern Turkey - but scores of people have been killed in more than a dozen attacks over the last three months."
More:Turkey's cycle of violence - Europe - Al Jazeera English