May Day Strike and Mayhem. Eight hours for work, eight hours for rest and eight hours for what you will.. --A slogan of the Eight-hour Day movement. May 1, 1886, was the deadline that unions and other worker organizations set for a national general strike.
On January 31, 2008 the US Navy tested a railgun that fired a shell at 10.64 MJ with a muzzle velocity of 2,520 m/s (8,270 ft/s). Its expected performance is a muzzle velocity over 5,800 m/s (19,000 ft/s), accurate enough to hit a 5-metre (16 ft) target over 200 nmi (370 km) away while firing at 10 shots per minute.
The international definition of high-speed rail embraces new lines with a top speed of at least 250 km/h (155 mph) and existing lines with a top speed of around 200 km/h (124 mph). As of 2011, there are four classic main railway lines in Britain operating at up to 201 km/h (125 mph), plus 108 km (70 mi) of purpose-built high-speed line.