Suits against United States, under Federal Tort Claims Act, by father and his minor son for personal injuries sustained by such minor son when he picked up military fuse which he found in field near his home and which subsequently exploded causing injury to his hand, allegedly as result of negligence of defendant's servants and agents. The District Court, Wilkin, J., held that evidence was insufficient to show actionable negligence on part of government agents in dumping munitions in that location.