In new tactic, smugglers use drone to fly meth over Mexican border into San Diego, officials say

The buzz of a motor overhead at nearly 11:30 p.m. was the tip-off.

A remote-controlled drone flew over the border fence from Mexico, heading for San Ysidro, while a Border Patrol agent listened and watched. He radioed ahead to other agents to be on the lookout for the small aircraft.

Ten minutes...