Migrants fill Tijuana shelters, more on way to US border By ELLIOT SPAGAT and MARIA VERZA, Associated Press TIJUANA, Mexico (AP) — The first members of a caravan of Central Americans to reach the U.S. border slept in overcrowded shelters and in tents with a view of armed U.S. Border Patrol agents, with many saying they will wait for other migrants to join them before making their next moves. Hundreds