homeland security chief jey johnson says no incredible intelligence pointing to an attack in the u.s. but the brussels bombings stepped up security in this country. extra security was deployed at major airports and transit hubs across the u.s. security officials are considering additional screening for air travelers coming from belgium into the u.s. >>> president obama is in argentina this morning and arrived in buenos aires after ending his historic trip to cuba. before leaving, havana, he attended a baseball game between the tampa bay rays and the cuban national team. the president was asked if he would skip the game, given the attacks in belgium. >> they can't defeat the world. they can't produce anything. they don't have a message that appeals to the vast majority of muslims or the vast majority of people around the world. what they can do is scare and make people afraid. and disrupt our daily lives and divide us. and as long as we don't allow that to happen, we are going to be okay. >> mr. obama said the brussels attack is the latest example of why the entire world must unite to