The countries in range of Iranian ballistic missiles (infographic)
Tensions heighten between Washington and Tehran
US pulls nonessential staff from Iraq amid Mideast tensions
The U.S. in recent days has ordered the USS Abraham Lincoln aircraft carrier strike group to the Gulf region, plus four B-52 bombers
The suspected sabotage of oil tankers puts the Persian Gulf on high alert
If the incident is tied to Tehran it would raise questions about whether harder-liners in Iran attempt to up the ante regionally
