a terrorist pretending to be a journalist set off the bomb. they can honor the strength, courage and generosity of a photographer who covered horrific events withprofessiona. we honor him, along with his family, including his daughter born six weeks ago. we send our love. we'll from more on his life posted on twitter and my sn snapchat pages. the president's press conference is later on this afternoon. much more to discuss with my colleagues ali velshi and stephanie ruhle. >> thank you for bringing that photo to our attention. that is something we'll be covering this hour, as well. good morning. i'm ali velshi. >> i am stephanie ruhle. it is monday, april 30th. let's get started. >> the drama playing out at the u.s./mexican border. the world has been following the journey of the caravan of asylum