Officials say he bought materials to build explosive devices and traveled to New York City on September tenth as part of planning for an attack.

VOA: special.2009.10.17

The Obama administration is considering an increase in troop levels to counter increased military casualties from improvised explosive devices.

VOA: standard.2009.09.12

"We have faced an enemy who do not want to fight us force-on-force, rather they wanted to lay improvised explosive devices to halt us in our path and this summer total of 1,800 Improvised explosive devices laid in our path, so we have had to adapt quickly."

VOA: standard.2009.10.12