of now for u.s. naval vessels to escort commercial ships through the straight. we learned late yesterday that iran tried to shoot down an american drone on two separate occasions in recent days, using surface-to-air missiles. in fact u.s. central command released this photo officials say the unexploded mine removed from one of the tankers is the same type of mine used to attack four oil tankers last month, in the same area. the you arab emirate presented evidence to the u.n. security council that the attacks were state sponsored. oil prices increased by about 4% following thursday s tank era tacks, but remained lower than where they were two months ago. g20 ministers meeting in in japan vowed to stabilize the oil market and the u.s. granted a waiver to iraq to import iranian gas for the next three months but encouraged baghdad to find an alternative. in fact this video released by the u.s. military claims to show proof of iran s involvement in