TEHRAN (Reuters) - Iran raised the prospect on Tuesday of sending military ships close to the United States' Atlantic coast, in what would be a major escalation of tensions between the long-standing adversaries. "Like the arrogant powers that are present near our marine borders, we will also have a powerful presence close to American marine borders," the head of the Navy, Rear Admiral Habibollah Sayyari said, according to the official IRNA news agency. /snip