riyadh/dubai u.s. law allow lawsuits saudi arabia sept. 11 attack meet stony silence riyadh thursday saudis bristle say kingdom curb business security tie response senate house representatives vote overwhelmingly wednesday approve legislation allow families kill 2001 attack unite state seek damage saudi government riyadh always dismiss suspicions back attackers kill nearly 3,000 people banner islamist militant group al qaeda fifteen 19 hijackers saudi nationals saudi government finance extensive lobby campaign justice sponsor terrorism act jasta run-up vote warn would undermine principle sovereign immunity saudi officials lobby bill stop short threaten retaliation law pass official reaction saudi arabia vote short-term expect little curt statement disapproval riyadh long-standing alliance kingdom unite state one cornerstones middle east politics security trade reactions thursday saudis say jasta would jeopardize see interdependent relationship would happen saudi arabia freeze cooperation unite state regard counter-terrorism response jasta salman al-dosary editor-in-chief pan-arab saudi-owned al sharq al-awsat newspaper write twitter saudi riyal fell u.s. dollar forward foreign exchange market thursday bill pass prompt drop dollar demand riyadh people reluctant buy dollars ... price say raed al-sayari whose family run exchange shop bustle commercial district popular foreign workers concern dollar keep appreciate situation stabilize come days demand would big loss market saudi riyal sar= peg 3.75 dollar spot market bank often use forward market hedge risk analysts argue al saud rule family interpret move political expedience lawmakers u.s. election season chance successful lawsuit uncertain best measure nothing ease long-standing friction alliance president barack obama veto jasta override congress increasingly see kingdom fellow gulf arab favor bitter rival iran charge washington deny differ riyadh syria arab crises bill reflect anti-saudi campaign time see less america midst say abdulkhaleq abdulla political scientist unite arab emirates analysts speculate riyadh could retaliate curb u.s. trade big arab economy restrict cooperation security crucial relationship u.s. counter-terrorism peace efforts arab conflict theodore karasik gulf state analytics write al arabiya website jasta would ignite firestorm legal warfare directly undermine political relationships time robust tie fight terrorism require say measure could also disrupt sweep economic reform mean boost private sector foreign investment wean kingdom oil dependence analysts speculate bilateral trade investment could hurt kingdom own 96.5 billion u.s. treasury bond believe hold least sum u.s. assets bank account u.s. 9/11 law exasperate saudis government silent