Big Ben Facelift

Three men have abseiled down the tower that houses Big Ben to repair any damage to the clock faces. The trio descend each of the four sides of the clock face at a height of around 315ft (96m).
Each clock face is 23 ft (7m) in diameter, while there are a total of 312 pieces of opal glass.
Two height safety specialists abseiled on the clock faces initially. Then specialist heritage glazer Tony McGilbert abseiled to evaluate the repairs to the fragile glass fascia panels within the clock faces.
The men wore ear defenders as the clock continued to strike as they carried out the work, which was expected to last all day and their equipment was attached to them to ensure it cannot fall onto the ground below.
See http://www.bbc.co.uk/news/uk-england-london-10950547 for more.

ACES - The Most Accurate Clock in Space

A clock ensemble, ACES (Atomic Clock Ensemble in Space), is to fly to the International Space Station in 2014. This caesium clock, because it will be affected only by microgravity, will be 100 times the accuracy of GPS clocks and will be a common reference point for ground based atomic clocks which could reveal if a physical 'constant' called alpha is not constant after all. (See 'Space station to host super-clock', New Scientist, 31 July 2010, p5)