Does the phrase "smoking hole" mean anything?

Iran vowed on Wednesday to strike at U.S. interests worldwide if it is attacked by the United States, which is keeping military options open in case diplomacy fails to curb Tehran's nuclear program. Supreme Leader Ayatollah Ali Khamenei made the threat two days before the U.N. nuclear watchdog reports on whether Iran is meeting Security Council demands to halt uranium enrichment. "The Americans should know that if they assault Iran their interests will be harmed anywhere in the world that is possible," Khamenei was quoted as saying by state television. "The Iranian nation will respond to any blow with double the intensity," he said.