The Senate has voted to build a fence along parts of the Mexico border to prevent illegal immigrants from entering the country. In total, 370 miles of triple-layered barriers would be added near San Diego and in the Arizona desert. Senators also approved a provision that would prevent illegal immigrants from petitioning for a guest-worker permit without the sponsorship an employer. And in a unanimous vote, Senate accepted an amendment that would bar granting work permits to undocumented immigrants convicted of either a felony or at least three misdemeanors. The measure would effect even those who ignored a court-deportation order.