
Federal agents outside Delaney Hall Detention Facility in Newark in June. Immigration and Customs Enforcement has curbed access to its detention centers and required seven daysβ notice for lawmakers seeking entry.

Facebookβs C.E.O. Mark Zuckerberg rings the Nasdaqβs opening bell from Facebookβs headquarters in Menlo Park, Calif., on May 18, 2012, the day of the companyβs initial public offering, while Sheryl Sandberg, Facebookβs C.O.O., looks on.