when agents arrived at anton calouri's apartment, he greeted them with a shotgun. >>> tropical storm threaten tampa on monday, as republicans gather for their national convention. >>> today, we have showers in the carolinas and georgia. heavy rain and flash flooding in central florida. storms could trigger floods in the west around albuquerque, salt lake city and sin city. >>> and finally this wednesday morning, a journey -- a cold journey, albeit, to the top of the world. >> very cold. it was taken by our friend and colleague, linsey davis, all to track down an animal that very few people have ever seen in person. and here's what she found in extreme northern canada. >> reporter: i'm traveling to one of the most inhospitable places in the world, in the middle of nowhere, bathen island, deep in the heart of the arctic circle. this is the price of admission for a shot at seeing one of the most elusive creatures on the planet, the narwhal, the so-called unicorn of the ocean, with the single tusk that can be up to ten feet long. they're rumored to live up to 90 and dive a mile below the

apartment after he reportedly sent a threatening e-mail to a general fbi account. 31-year-old anton calouri greeted them with a shotgun. and they later arrested him. a search of his apartment uncovered no bombs, though. calouri lived with his mother who said he's a good boy, who just did a stupid thing. >>> the deadline for todd akin to give up his senate bid has come and gone. the missouri republican did apologize for his controversial remarks about rape. but he is vowing to stay in the race. abc's tahman bradley joins us from washington with the very latest. good morning, tahman. >> reporter: good morning, paula. the republican establishment wanted todd akin gone. but he's staying in. and democrats sense an opportunity. this is what republicans now face as the campaign enters the home stretch. an aggressive effort by democrats to link mitt romney and paul ryan to todd akin. wrong for women, this banner says. the missouri senate candidate apologized for his legitimate rape comments. and in a radio interview said he shouldn't be asked to drop out. >> basically, i misspoke one word and one s

the suspect, identified as 31-year-old anton calouri, allegedly made a statement about bombs being in the apartment. as a precaution, authorities conducted a search of the residence, which took hours to complete. ultimately, no explosives were found. but it made for tense moments last night. >> good news in the end. that suspect is due in court today. pierre thomas, thank you for that. >>> another potential threat to report this morning. police in tampa have confiscated a pipe and bricks from a rooftop not far from the site of next week's republican convention. they believe those items were stashed there by protesters. the department has been conducting drills to prepare for such circumstances. >>> and we learned overnight that at least 50 buildings, many of them homes, have now been destroyed by that massive wildfire burning in northern california. the national guard has now been called in to help the nearly 2,000 firefighters on the scene. and we're now on track for the worst u.s. fire season on record. the amount of land burned this year alone is as big as the state of maryland. >>