The US president's comments come as he met Boris Johnson for talks in the White House.
Damien Bendall is accused of killing Terri Harris and three children at a house in Derbyshire.
Taxpayers will foot a bill to open up a key carbon dioxide producer amid food supply and nuclear fears.
The men, aged 24 and 29, were detained on Wednesday under the Terrorism Act.
The coffee and sandwich chain says it hopes to open 200 shops and double in size within five years.