Secret Service released 76-word messages signaling the test flights . Do not say when the flights will take place or what the drones capabilities are . Secret intelligence has become increasingly worried about the threat to president from UAVs . Agency was embarrassed by drone that drone landed in late march on White lawn lawn .
Secret Service released 76-word statement signaling the test flights . Would not say when the flights will take place or what the drones capabilities are . Secret Service has become increasingly worried about the threat to president from UAVs . Agency was embarrassed by drone that crash landed in late January on White House lawn .