Bombs Smuggled Onto Planes

• UK Tightens Airport Security After US Warns of Bomb Concerns

  Britain has stepped up security at airports after US officials said they were concerned that al Qaeda operatives in Syria and Yemen were developing bombs that could be smuggled onto planes.

• US Increases Security at Overseas Airports Amid Bomb Concerns

  The United States said on Wednesday it would increase security at overseas airports with nonstop flights to the country and US officials cited concerns al Qaeda operatives in Syria and Yemen were developing bombs that could be smuggled onto planes.