In Jordan’s ancient Petra, sirens warn of flash floods

In ancient times, Arab tribesmen dug diversion tunnels to protect their low-lying trading post of Petra against desert flash floods. More than two millennia later, an alarm system warns visitors if flood water rushes toward what has become Jordan’s main tourist attraction.

Migrants get cool reception in Mexican border town

Many of the nearly 3,000 Central American migrants who have reached the Mexican border with California via caravan said Saturday they do not feel welcome in the city of Tijuana, where hundreds more migrants are headed after more than a month on the road.