Passengers ride a cable car that links downtown La Paz with El Alto, Bolivia, in September. The trip costs about 40 cents and takes 10 minutes — compared with 35 cents and a half-hour by minibus. Juan Karita/AP hide caption

itoggle caption Juan Karita/AP

Surveyors work below the Interstate 495 bridge over the Christina River near Wilmington, Del., on Tuesday. The bridge was closed at the beginning of the week after officials discovered that eight support columns were tilting. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

Saudi women get into a taxi outside a shopping mall in Riyadh in 2012. Plans for a subway system in the Saudi capital are likely to provide the biggest benefits to women and the poor. Fayez Nureldine/AFP/Getty Images hide caption

itoggle caption Fayez Nureldine/AFP/Getty Images

Law enforcement agents arrive at a United Parcel Service staging area at Newark Liberty International Airport, where a cargo plane was searched and a suspicious package removed Friday. Joe Epstein/FR170243 AP hide caption

itoggle caption Joe Epstein/FR170243 AP