title: Fears mount over 'fortress' America.
authors.forename: Nigel
authors.initials: N
authors.lastname: Williams
mesh_terms: D004641:Emigration and Immigration / Q000331:legislation & jurisprudence*; D033161:Government Regulation; D012106:Research; D012637:Security Measures / Q000331:legislation & jurisprudence*; D013234:Stem Cells; D013334:Students; D014481:United States