US steps up security amid fears of Brussels copycat attacks

sdayWASHINGTON (AP) — The Obama administration stepped up security at major transit hubs across the country after Tuesday's airport and subway bombings in Brussels, as top U.S. intelligence officials warned of the risk for copycat attacks at home. President Barack Obama vowed to help Belgium track down those responsible for the deadly explosions. Homeland Security Secretary Jeh Johnson stressed there is no "specific, credible intelligence" pointing to a similar plot in America, but he said the

sdayWASHINGTON (AP) — The Obama administration stepped up security at major transit hubs across the country after Tuesday's airport and subway bombings in Brussels, as top U.S. intelligence officials warned of the risk for copycat attacks at home. President Barack Obama vowed to help Belgium track down those responsible for the deadly explosions. Homeland Security Secretary Jeh Johnson stressed there is no "specific, credible intelligence" pointing to a similar plot in America, but he said the…