With Tomahawk cruise missiles being prepared for possible use against Syrian government targets, NBC News takes a look closer look at the military technology, which dates back to the Cold War. With GPS, on-board digital maps and video cameras, in addition to the 550 mph speed they can attain at top flight, their destruction power is massive. "These things, you can hear them coming, even at night," Jeffrey White, defense fellow at the Washington Institute for Near East Policy, told NBC News. "They're not going to be screaming in like rockets, but you hear them just trundling along." The first tomahawk missiles were built to carry nuclear warheads and could fly up to 1,500 miles. Today's Tomahawks either carry a 1,000-pound conventional warhead or a package of 166 cluster bombs. Their standard range is 1,000 miles.