The embassy in Damascus suspended its operations in 2012.
Rebel forces in Syria are building a transitional government after toppling the regime of President Bashar Assad in a lightning-quick advance across the country.
Meanwhile, the ceasefire in Lebanon is holding despite ongoing Israeli airstrikes on Hezbollah targets, which Israeli officials say are responses to ceasefire violations by the Iranian-backed militant group. The Israel Defense Forces continues its intense airstrike and ground campaigns in Gaza.
Tensions also remain high between Israel and Iran after tit-for-tat long-range strikes in recent months and threats of further military action from both sides.
The USS Harry S. Truman aircraft carrier strike group has arrived in the Middle East, according to U.S. Central Command.
The move from the Mediterranean was planned before the fall of the Assad regime in Syria, a U.S. official told ABC News.
The Truman replaces the USS Abraham Lincoln, which left the region last month.
-ABC News' Matt Seyler
