-> when they dropped the white phosphorous on villagers, massacred children, burned down peoples farms, etc in the war that occured between 2001-present
"But within a year, Operation Iron Tempest had fizzled out. Many of the suspected labs turned out to be empty, mud-walled compounds. After more than 200 airstrikes, the U.S. military concluded it was a waste of resources to keep blowing up primitive targets with advanced aircraft and laser-guided munitions."
Please cite sources.