• 3 DVDs

• 4 History
• 2 Accidents
• 2 Campaigns
• 2 Disasters
• 2 Engineering
• 2 Gettysburg, Battle of, Gettysburg, Pa., 1863
• 2 Reliability (Engineering)
• 2 Safety factor in engineering
• 1 Archeaology and history
• 1 Assassins
• 1 Floods
• 1 Mafia
• 1 Mine fires
• 1 Organized crime
• 1 Structural failures

• 5 History Channel (Television network)
• 2 Actuality Productions
• 2 Alexander Street Press
• 2 Millar, James
• 2 Nash, Bruce M
• 2 Raphael, Max
• 1 A & E Home Video (Firm)
• 1 Alan Ett Music Group
• 1 Ett, Alan
• 1 Genin, Beata
• 1 Kurtis Productions
• 1 Kurtis, Bill
• 1 Levinson, Kelly
• 1 Morris, Gloria L
• 1 Schneider, Lee
• 1 Towers Productions, Inc
• 1 Towers, Jonathan
• 1 Wakabayashi, Motoshi

• 5 English
• 1 Dyula

• 2 United States
• 1 Centralia
• 1 Johnstown
• 1 Philadelphia
• 1 Philadelphia (Pa.)
• 1 Valley Forge
• 1 Valley Forge (Pa.)

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