Expression error: Unexpected < operator.
The Vertibird bomb is a miscellaneous item in Fallout: New Vegas.
It is a bomb used to sabotage Bear Force One in order to kill President Kimball after his speech. During You'll Know It When It Happens it is found planted on the Vertibird and can be disarmed.
During Arizona Killer it can be given to you by Cato Hostilius as one of the means to assassinate the president.