More Secret Service agents gone; Obama briefed

WASHINGTON — Three more Secret Ser­vice offi­cers resigned Fri­day in the expand­ing pros­ti­tu­tion scan­dal that has brought scorch­ing crit­i­cism of agents’ behav­ior in Colom­bia just before Pres­i­dent Barack Obama’s visit for a sum­mit meet­ing last week. Agency Direc­tor Mark Sul­li­van came to the White House late Fri­day to per­son­ally brief Obama in the Oval Office.