riyadh saudi arabia foreign ministry condemn passage u.s. law would allow families victims sept. 11 2001 attack sue kingdom damage call matter great concern statement thursday u.s. senate house representatives vote overwhelmingly wednesday approve legislation allow families kill 2001 attack unite state seek damage saudi government erosion sovereign immunity negative impact nations include unite state say saudi statement carry state news agency spa day stony silence riyadh foreign ministry express hope u.s. congress would correct legislation avoid serious unintended consequences may ensue without elaborate consequences might 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 specific retaliation law pass saudi riyal fell u.s. dollar forward foreign exchange market thursday law pass analysts say successful lawsuit saudi government would unlikely best speculate uncertainty surround legal implications could negatively affect bilateral trade investment major ally saudi arabia gulf state neighbor unite arab emirates warn long-term grave repercussions congress override obama veto tweet late thursday anwar gargash uae minister state foreign affairs call u.s. congress move dangerous precedent international law undermine principle sovereign immunity future sovereign investments unite state late tweet gargash say country reactions legal investment front hasty ease damage require joint action saudi foreign ministry condemn passage u.s. sept. 11 law