Homeland Security warns airlines of new threat 
  
| FILE - In this Wednesday, Nov. 23, 2011, file photo, travelers, with luggage in hand, make their way toward Terminal A at O'Hare International Airport in Chicago. The U.S Department of Homeland Security said Wednesday, Feb. 19, 2014, it is warning airlines that terrorists could try to hide explosives in shoes. It's the second time in less than three weeks that the government has issued a warning about possible attempts to smuggle explosives on a commercial jetliner. | 
     WASHINGTON     
(AP) -- The Homeland Security Department has warned airlines that 
terrorists could try to hide explosives in shoes. It's the second time 
in less than three weeks that the government has issued a warning about 
possible attempts to smuggle explosives on a commercial jetliner.
Homeland
 Security said Wednesday it regularly shares relevant information with 
domestic and international partners, but it declined to discuss 
specifics of a warning sent to airlines.
"Our 
security apparatus includes a number of measures, both seen and unseen, 
informed by the latest intelligence and as always DHS continues to 
adjust security measures to fit an ever evolving threat environment," 
the department said in a statement.
A U.S. 
intelligence official told The Associated Press that DHS released a 
notice to airlines reiterating that liquids, shoes and certain cosmetics
 were of concern, all of which are covered under existing Transportation
 Security Administration security policies.
The latest warning was focused on flights headed to the United States from abroad.
The
 official said "something caused DHS concern, but it's a very low 
threshold to trigger a warning like this." 
The official spoke on 
condition of anonymity because he was not authorized to discuss the 
issue publicly.
Earlier this month Homeland 
Security warned airlines with flights to Russia to be on the lookout for
 explosive devices possibly hidden inside toothpaste. The Transportation
 Security Administration then banned passengers from bringing any 
liquids in their carry-on luggage on nonstop flights from the U.S. to 
Russia. 
That warning became public just days before the opening 
ceremonies of the Winter Olympics in Sochi.
It
 is unclear if the latest warning, first reported Wednesday by NBC News,
 is related to the earlier threats to Russia-bound flights.
Air
 passengers in the United States have had to take off their shoes at 
airport security checkpoints since shortly after Richard Reid tried to 
ignite explosives hidden in his shoes on a Miami-bound flight in late 
2001. Reid pleaded guilty to terrorism charges and is serving a life 
sentence.
The traveling public has grown increasingly impatient with expanding security checks at airports.
TSA
 in recent years has changed some security procedures to allow young 
children and passengers 75 and older to keep their shoes on. The 
security agency has also launched a fee-based program that allows 
willing flyers to submit to background checks and avoid having to remove
 their shoes, jackets and small amounts of liquids packed in carry-on 
luggage.