I can't get a dialling tone <a href=" http://www.valleyseakayaks.com/where-to-buy-obagi-tretinoin-cream-01.pdf ">tretinoin gel 0.05 purchase</a> The killing 13 months ago of the U.S. ambassador during an Islamist attack on Washington's consulate in Benghazi drew world attention to Libya's problems. But daily confrontations, including sieges in recent months of government ministries and oil installations, have posed greater problems for its rulers.