The broadcast networks are planning special coverage tomorrow of the opening of the National September 11 Memorial Museum. Pres. Obama will speak at the dedication between 10-11amET. ABC News has already announced it will carry his remarks live. This morning on “Today,” NBC’s Matt Lauer got a first look inside the memorial with former Mayor Michael Bloomberg, who is chairman of the museum. Family members of those killed on 9/11/01 will be the first to get a look at the museum. It opens to the public a week from today.