FBI director says China poses a more serious counterintelligence threat than any other country, including Russia.
Paul Rosenfeld of New York planned to use the bomb to kill himself and draw attention to his radical political beliefs.
Officers were pretending to be interesting in accessing a satellite system for tracking aircraft, vehicles and vessels.
FBI alleges Alphons Iacobelli gave a former UAW vice-president and his wife more than $1.2 million in gifts.
Marvin Jay Caukin used the money to fund a playboy lifestyle including luxury homes, fancy cars and high-class escorts, investigators say.
Christina Liew’s husband is currently serving 15 years for espionage charges related to the case.
Quest for more access to US market checked for possible security threat.