Drug smugglers using ultralights to cross border

TUCSON, Ariz. – Smugglers facing strengthened border defenses have turned to an old and risky tactic — using single-seat ultralight aircraft to fly marijuana loads into the country.

Officials know of at least three such attempts in recent months — all of which ended badly for the smugglers — but they don't know how many others have been made or whether any have been successful. ....