Thousands of law enforcement from dozens of agencies will guard the ceremonies, and authorities have planned for many contingencies, says Homeland Security Secretary Jeh Johnson.
The punishment includes, in some cases, suspensions without pay for improperly reviewing records about Utah Rep. Jason Chaffetz. An employee who leaked data to the press has resigned.
The airline industry predicts it will see a 4 percent increase in passengers between June 1 and Aug. 31. The travel rush is contributing to the long waits at airport security checkpoints.
Jeh Johnson tells NPR's Morning Edition that the existing U.S. refugee program is "probably the most thorough, multilayered, time-consuming way for anyone to cross our borders."
According to ABC News, covert tests found that Transportation Security Administration agents at airports failed to detect prohibited items 95 percent of the time.