KAMPALA, Uganda – A small group of desert locusts has entered Congo, marking the first time the voracious insects have been seen in the Central African country since 1944, the U.N. Food and Agriculture Agency said Tuesday as U.N. agencies warned of a “major hunger threat” in East Africa from the flying pests. Kenya, Somalia and Uganda have been battling the swarms in the worst locust outbreak that parts of East Africa have seen in 70 years.