"It was almost closing time when the siege began at a small Wells Fargo Bank branch in a suburb of San Diego, and it was a nightmare. The three gunmen entered with the intent to rob, but as they herded the 18 customers and bank employees toward a back room, they were spotted by a pedestrian outside who promptly called 911. Within minutes, police cars were pulling up, the bank was surrounded, and back-up was being called in from neighboring communities. The gunmen promptly barricaded themselves inside with their hostages, including women and small children, and refused to let anyone leave.
The police called on the gunmen to surrender, but before negotiations could even begin, shots were fired from within the bank, wounding a police officer. The events that followed –now known to everyone, thanks to 24/7 news coverage –shocked the nation. Declaring the bank robbers "terrorist suspects," the police requested air support from the Pentagon and, soon after, an F-15 from Vandenberg Air Force Base dropped two GBU-38 bombs on the bank, leaving the building a pile of rubble."
It's worth reading the whole article to gain perspective.