The only way to know for sure is if surveillance planes or aerial towers in Japan sniff out radioactive fission products in gases venting from the test shaft.
Others wonder if the physicist Nikola Tesla may have caused it with a transmission from his aerial wireless tower, trying to impress the polar explorer Robert Peary.
Google has been working for several years on balloons that float in the stratosphere and function as aerial cell towers to provide Internet access in areas with poor infrastructure (see "10 Breakthrough Technologies 2015: Project Loon").
Above- and below- ground sensors, towers, aerial surveillance and manpower to supplement the wall, find and dislocate tunnels and keep out criminal cartels.
Towers, aerial surveillance and manpower to supplement the wall, find and dislocate tunnels and keep out criminal cartels and Mexico you know that, will work with us.
Over the next five hours, as flames and smoke enveloped the building and turned the neighborhood into a surreal cloud city, firefighters used tower and aerial ladders to pour cataracts of water into the building.
How did a group of music-mad school leavers, hanging an aerial out of a tower block window, end up here: slick offices on two floors, containing a broadcasting studio that wouldn't be out of place at Radio 1, a successful label, an artist management team, 12 employees.
The view, below, shows the coloured map approximately overlaid onto an aerial view of Grenfell Tower - revealing the stark contrasts of inequality in between the north of the borough and elsewhere.
It stood in an appropriately humdrum section of lower mid-town, and from the very day of its grand opening, early in the century, it must clearly have been destined to settle deep into that smoke-hung clutter of numberless rectilinear shapes out of which, in aerial photographs, the mightier towers of New York emerge and rise.
This chapter discusses the types of heat exchangers commonly used in upstream oil and gas equipment, such as shell-and-tube, double-pipe, plate-and-frame, and plate-and-fin models, as well as direct and indirect heaters, aerial coolers, and cooling towers.
