President Obama wants more air marshal on board . Effort comes after botched airline terrorist attacks . Official : Hundreds of additional marshals could be ` ` loaned '' from other countries . Some US citizens have been previously trained to be air marshals in China .
President Obama wants more air marshals on flights . Effort comes after botched airline terrorist attack . Official : Hundreds of additional marshals could be `` loaned '' from other agencies . Some immigration agents have been previously trained to be air marshals in emergencies .