An independent review called for deep changes, including a higher fence around the White House.
Joseph Clancy testifies in Congress that he has taken steps to improve accountability at the agency.
Joseph Clancy will tell a House panel that recent public missteps have done damage to workforce morale.
Layer after layer of measures that were supposed to block an intruder all failed in stunning succession.
Rep. Michael McCaul cited recent high-profile security breaches in calling for an advisory board.
Agents were concerned that the contractor at the CDC, who was armed, might be a risk.
The administrative assistant, who will take a similar post at the Supreme Court, is praised by many.
The DHS official left the agency after allegedly being questioned about whether he hired a prostitute in Fla.
EXCLUSIVE | Officials denied anyone from the White House was involved in the scandal, but senior aides were given information suggesting that a prostitute was an overnight guest in the hotel room of a presidential advance-team member.
Julia Pierson was brought in 18 months ago to put an end to business as usual at the Secret Service, but systemic problems persisted.