DEBKAfile's military sources report a decision by the Obama administration to boost US military strength in the Mediterranean and Persian Gulf regions in the short term with an extra air and naval strike forces and 6,000 Marine and sea combatants. Carrier Strike Group 10, headed by the USS Harry S. Truman aircraft carrier, sails out of the US Navy base at Norfolk, Virginia Friday, May 21. On arrival, it will raise the number of US carriers off Iranian shores to two.