>> bottom of the hour. thanks for joining us this saturday. happy july 4th. on this weekend, security across the nation is ramping up. new york's governor adding manpower, enhancing monitoring operations for the holiday. officials across the country are boosting security at fireworks shows and landmarks. concerns are much higher this year, in part because of the calendar, fourth of july happening during the holy month of ramadan and terrorist networks taken to social media, urging supporters to carry out attacks during this weekend. among the fears this holiday, threat of a lone wolf attack on soft targets. those places more vulnerable to attack. officials worry that there could be attacks similar to the recent ones in tunisia and france. cnn's rene marsh takes a closer look at what's being done to protect july 4th festivities.